{"title":"Foster 310 Series Couplers","description":"\u003cp\u003eFoster 310 Series pneumatic quick couplers and plugs, interchangeable with ARO 310 Series 3\/8\" body air fittings. Rated 300 PSI, one-way shut-off, with manual or automatic sockets. Brass\/steel, 303 stainless, and nickel-plated options; steel plugs.\u003c\/p\u003e","products":[{"product_id":"foster-310-1714-310-series","title":"Foster 310-1714, 3\/8\" ARO Coupler x 3\/8\" Push-On Hose Stem, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-1714\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-1714\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Push-On Hose Stem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePush-on hose stem\u003c\/strong\u003e — which means a secure grip on push-on hose with no separate clamp.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355419695,"sku":"FOST 310-1714 (1)","price":27.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-1814-310-series","title":"Foster 310-1814, 3\/8\" ARO Coupler x 1\/2\" Push-On Hose Stem, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-1814\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-1814\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/2\" Push-On Hose Stem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePush-on hose stem\u003c\/strong\u003e — which means a secure grip on push-on hose with no separate clamp.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355452463,"sku":"FOST 310-1814 (1)","price":28.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-4004-310-series","title":"Foster 310-4004, 3\/8\" ARO Coupler x 1\/4\" Female NPT, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-4004\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-4004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/4\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355517999,"sku":"FOST 310-4004 (1)","price":23.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-4104-310-series","title":"Foster 310-4104, 3\/8\" ARO Coupler x 1\/4\" Male NPT, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-4104\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-4104\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/4\" Male NPT, MPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355583535,"sku":"FOST 310-4104 (1)","price":23.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-42-310-series","title":"Foster 310-42, 3\/8\" ARO Plug x 3\/8\" Male NPT, 310 Series, Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-42\u003c\/strong\u003e is a steel 3\/8\" plug from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-42\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Male NPT, MPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this plug\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it plugs into any matching ARO 310-style 3\/8\" socket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel\u003c\/strong\u003e — which means durable service under repeated high-pressure cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series sockets — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this plug with a matching 3\/8\" ARO 310 socket for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355649071,"sku":"FOST 310-42 (1)","price":4.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-4204-310-series","title":"Foster 310-4204, 3\/8\" ARO Coupler x 3\/8\" Female NPT, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-4204\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-4204\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355681839,"sku":"FOST 310-4204 (1)","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-43-310-series","title":"Foster 310-43, 3\/8\" ARO Plug x 3\/8\" Female NPT, 310 Series, Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-43\u003c\/strong\u003e is a steel 3\/8\" plug from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this plug\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it plugs into any matching ARO 310-style 3\/8\" socket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel\u003c\/strong\u003e — which means durable service under repeated high-pressure cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series sockets — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this plug with a matching 3\/8\" ARO 310 socket for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355812911,"sku":"FOST 310-43 (1)","price":5.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-4304-310-series","title":"Foster 310-4304, 3\/8\" ARO Coupler x 3\/8\" Male NPT, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-4304\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-4304\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Male NPT, MPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529355878447,"sku":"FOST 310-4304 (1)","price":24.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-4404-310-series","title":"Foster 310-4404, 3\/8\" ARO Coupler x 1\/2\" Female NPT, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-4404\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-4404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/2\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529356566575,"sku":"FOST 310-4704 (1)","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-48-310-series","title":"Foster 310-48, 3\/8\" ARO Plug x 3\/8\" Hose ID, 310 Series, Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-48\u003c\/strong\u003e is a steel 3\/8\" plug from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-48\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Hose ID\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this plug\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it plugs into any matching ARO 310-style 3\/8\" socket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel\u003c\/strong\u003e — which means durable service under repeated high-pressure cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series sockets — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this plug with a matching 3\/8\" ARO 310 socket for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529356599343,"sku":"FOST 310-48 (1)","price":7.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-4804-310-series","title":"Foster 310-4804, 3\/8\" ARO Coupler x 3\/8\" Hose ID, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529356861487,"sku":"FOST 310M-4004 (1)","price":32.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4104-310-series","title":"Foster 310M-4104, 3\/8\" ARO Coupler x 1\/4\" Male NPT, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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The Foster \u003cstrong\u003e310M-4204\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310M-4204\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual sleeve operation\u003c\/strong\u003e — which means a positive, deliberate connect\/disconnect by retracting the socket sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003eRetract the socket sleeve to connect and to disconnect (manual operation).\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529356959791,"sku":"FOST 310M-4204 (1)","price":31.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4204np-310-series","title":"Foster 310M-4204NP, 3\/8\" ARO Coupler x 3\/8\" Female NPT, 310 Series, Manual, Nickel-Plated Brass\/Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357025327,"sku":"FOST 310M-4204NP (1)","price":33.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4304-310-series","title":"Foster 310M-4304, 3\/8\" ARO Coupler x 3\/8\" Male NPT, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357582383,"sku":"FOST 310M-4304 (1)","price":25.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4304np-310-series","title":"Foster 310M-4304NP, 3\/8\" ARO Coupler x 3\/8\" Male NPT, 310 Series, Manual, Nickel-Plated Brass\/Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310M-4304NP\u003c\/strong\u003e is a nickel-plated brass\/steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310M-4304NP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Male NPT, MPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Nickel-Plated Brass\/Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual sleeve operation\u003c\/strong\u003e — which means a positive, deliberate connect\/disconnect by retracting the socket sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNickel-plated finish\u003c\/strong\u003e — which means added corrosion resistance and a clean appearance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003eRetract the socket sleeve to connect and to disconnect (manual operation).\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357647919,"sku":"FOST 310M-4304NP (1)","price":39.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4404-310-series","title":"Foster 310M-4404, 3\/8\" ARO Coupler x 1\/2\" Female NPT, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310M-4404\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310M-4404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/2\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual sleeve operation\u003c\/strong\u003e — which means a positive, deliberate connect\/disconnect by retracting the socket sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003eRetract the socket sleeve to connect and to disconnect (manual operation).\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357680687,"sku":"FOST 310M-4404 (1)","price":33.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4504-310-series","title":"Foster 310M-4504, 3\/8\" ARO Coupler x 1\/2\" Male NPT, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357746223,"sku":"FOST 310M-4504 (1)","price":32.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4704-310-series","title":"Foster 310M-4704, 3\/8\" ARO Coupler x 5\/16\" Hose ID, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310M-4704\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310M-4704\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 5\/16\" Hose ID\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual sleeve operation\u003c\/strong\u003e — which means a positive, deliberate connect\/disconnect by retracting the socket sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003eRetract the socket sleeve to connect and to disconnect (manual operation).\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357910063,"sku":"FOST 310M-4704 (1)","price":31.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4804-310-series","title":"Foster 310M-4804, 3\/8\" ARO Coupler x 3\/8\" Hose ID, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310M-4804\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310M-4804\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Hose ID\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual sleeve operation\u003c\/strong\u003e — which means a positive, deliberate connect\/disconnect by retracting the socket sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003eRetract the socket sleeve to connect and to disconnect (manual operation).\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529357975599,"sku":"FOST 310M-4804 (1)","price":25.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4804np-310-series","title":"Foster 310M-4804NP, 3\/8\" ARO Coupler x 3\/8\" Hose ID, 310 Series, Manual, Nickel-Plated Brass\/Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310M-4804NP\u003c\/strong\u003e is a nickel-plated brass\/steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310M-4804NP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/8\" Hose ID\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Nickel-Plated Brass\/Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual sleeve operation\u003c\/strong\u003e — which means a positive, deliberate connect\/disconnect by retracting the socket sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNickel-plated finish\u003c\/strong\u003e — which means added corrosion resistance and a clean appearance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003eRetract the socket sleeve to connect and to disconnect (manual operation).\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358041135,"sku":"FOST 310M-4804NP (1)","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310m-4904-310-series","title":"Foster 310M-4904, 3\/8\" ARO Coupler x 1\/2\" Hose ID, 310 Series, Manual, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358073903,"sku":"FOST 310M-4904 (1)","price":36.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-sb3-310-series","title":"Foster 310-SB3, 3\/8\" ARO Coupler x Reusable Hose Clamp Fitting, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-SB3\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-SB3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Reusable Hose Clamp Fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable hose clamp fitting\u003c\/strong\u003e — which means you can re-clamp onto fresh hose instead of scrapping a crimped fitting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358139439,"sku":"FOST 310-SB3 (1)","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-sb5-310-series","title":"Foster 310-SB5, 3\/8\" ARO Coupler x Reusable Hose Clamp Fitting, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. The Foster \u003cstrong\u003e310-SB5\u003c\/strong\u003e is a brass and steel 3\/8\" coupler from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Foster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 310 Series (ARO 310 Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 310-SB5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ARO 310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Reusable Hose Clamp Fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-Way Shut-Off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic push-to-connect (retract sleeve to disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass and Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F (Buna seal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1pc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhy this coupler\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic push-to-connect\u003c\/strong\u003e — which means single-handed connection; just push the plug in. Retract the sleeve to disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARO 310 interchange\u003c\/strong\u003e — which means it mates with industry-standard ARO 310-style 3\/8\" air fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable hose clamp fitting\u003c\/strong\u003e — which means you can re-clamp onto fresh hose instead of scrapping a crimped fitting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eIt interchanges with ARO 310 Series plugs — a widely used 3\/8\" air-coupler style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 300 PSI working pressure, -40F to +250F with Buna seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it connect?\u003c\/strong\u003e\u003cbr\u003ePush the plug in to connect automatically; retract the sleeve to disconnect.\u003c\/p\u003e\u003cp\u003eIdeal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358172207,"sku":"FOST 310-SB5 (1)","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-sb7-310-series","title":"Foster 310-SB7, 3\/8\" ARO Coupler x Reusable Hose Clamp Fitting, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358336047,"sku":"FOST 310-SD13 (1)","price":30.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-sd7-310-series","title":"Foster 310-SD7, 3\/8\" ARO Coupler x Reusable Hose Clamp Fitting, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358368815,"sku":"FOST 310-SD7 (1)","price":29.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"},{"product_id":"foster-310-sd9-310-series","title":"Foster 310-SD9, 3\/8\" ARO Coupler x Reusable Hose Clamp Fitting, 310 Series, Automatic, Brass and Steel","description":"\u003cp\u003eReliable 3\/8\" air connections that interchange with ARO 310 Series couplers and plugs. 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Pair this coupler with a matching 3\/8\" ARO 310 plug for a complete, leak-free connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy from hpcouplers:\u003c\/strong\u003e Foster quality, responsive US-based support, accurate specs, fast shipping.\u003c\/p\u003e","brand":"Foster","offers":[{"title":"Default Title","offer_id":45529358893103,"sku":"FOST 310-SD9 (1)","price":29.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9849\/files\/Foster_Stock_Image_v1.png?v=1781220743"}],"url":"https:\/\/www.hpcouplers.com\/en-ie\/collections\/foster-310-series-couplersv.oembed?page=2","provider":"hpcouplers","version":"1.0","type":"link"}