{"title":"Foster FST Series Couplers (Straight-Thru)","description":"\u003cp\u003eFoster FST Series full-flow straight-through hydraulic couplers and plugs — no valve in either half, so the inside diameter matches the nominal pipe for maximum flow. Standard Industrial Interchange with manual sleeve connection, body sizes 1\/8\" to 1-1\/2\". Brass, steel, and 303 stainless; ball-lock option available. Note: lines do not self-seal on disconnect.\u003c\/p\u003e","products":[{"product_id":"foster-100fp-fst-series","title":"Foster 100FP, 1\" Straight-Thru Plug x 1\" Female NPT, FST Series, Steel","description":"\u003cp\u003eMaximum-flow connections for air, fluid, and vacuum lines. The Foster \u003cstrong\u003e100FP\u003c\/strong\u003e is a steel 1\" plug from the FST Straight-Thru Series - with NO valve in either half, so the coupling flows as freely as the pipe itself. Standard industrial interchange, rated to 2000 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 100FP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\" Standard Industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\" Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 2000 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel construction\u003c\/strong\u003e — which means strength and durability for demanding use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 2000 PSI (steel, 1\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. Pair this plug with a matching 1\" FST socket.\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":45534647255087,"sku":"FOST 100FP (1)","price":21.29,"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-100fpb-fst-series","title":"Foster 100FPB, 1\" Straight-Thru Plug x 1\" Female NPT, FST Series, Brass","description":"\u003cp\u003eMaximum-flow connections for air, fluid, and vacuum lines. The Foster \u003cstrong\u003e100FPB\u003c\/strong\u003e is a brass 1\" plug from the FST Straight-Thru Series - with NO valve in either half, so the coupling flows as freely as the pipe itself. Standard industrial interchange, rated to 1700 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 100FPB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\" Standard Industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\" Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 1700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 1700 PSI (brass, 1\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. Pair this plug with a matching 1\" FST socket.\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":45534647746607,"sku":"FOST 100FPB (1)","price":22.79,"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-100fps-fst-series","title":"Foster 100FPS, 1\" Straight-Thru Plug x 1\" Female NPT, FST Series, 303 Stainless Steel","description":"\u003cp\u003eMaximum-flow connections for air, fluid, and vacuum lines. The Foster \u003cstrong\u003e100FPS\u003c\/strong\u003e is a 303 stainless steel 1\" plug from the FST Straight-Thru Series - with NO valve in either half, so the coupling flows as freely as the pipe itself. Standard industrial interchange, rated to 1700 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 100FPS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\" Standard Industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\" Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 303 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 1700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 1700 PSI (303 stainless steel, 1\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. Pair this plug with a matching 1\" FST socket.\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":45534648926255,"sku":"FOST 100FPS (1)","price":67.19,"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-100fs-fst-series","title":"Foster 100FS, 1\" Straight-Thru Coupler x 1\" Female NPT, FST Series, Brass","description":"\u003cp\u003eMaximum-flow connections for air, fluid, and vacuum lines. The Foster \u003cstrong\u003e100FS\u003c\/strong\u003e is a brass 1\" coupler from the FST Straight-Thru Series - with NO valve in either half, so the coupling flows as freely as the pipe itself. Standard industrial interchange, rated to 1700 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 100FS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\" Standard Industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 1700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton (FKM) seal\u003c\/strong\u003e — which means compatibility with a wide range of fuels, oils, and chemicals at high temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Standard industrial interchange, rated to 1700 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 125FS-103\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1-1\/4\" Standard Industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1-1\/4\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1-1\/4\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e EPDM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 1700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 5000 PSI (303 stainless steel, 1\/8\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel construction\u003c\/strong\u003e — which means strength and durability for demanding use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Standard industrial interchange, rated to 1400 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 150FS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1-1\/2\" Standard Industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1-1\/2\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1-1\/2\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 1400 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel construction\u003c\/strong\u003e — which means strength and durability for demanding use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 5500 PSI (steel, 1\/4\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton (FKM) seal\u003c\/strong\u003e — which means compatibility with a wide range of fuels, oils, and chemicals at high temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton (FKM) seal\u003c\/strong\u003e — which means compatibility with a wide range of fuels, oils, and chemicals at high temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel construction\u003c\/strong\u003e — which means strength and durability for demanding use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose stem plug\u003c\/strong\u003e — which means a direct hose connection (requires hose 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 straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Standard industrial interchange, rated to 5500 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 38FPS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" Standard Industrial\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 Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 303 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 5500 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 5500 PSI (303 stainless steel, 3\/8\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. 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Standard industrial interchange, rated to 2700 PSI.\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 FST (Straight-Thru, Industrial Interchange)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 38FS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" Standard Industrial\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 Straight-Thru - NO valve in socket or plug (full flow)\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\u003eFlow:\u003c\/strong\u003e Inside diameter same as nominal pipe - maximum flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 2700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel construction\u003c\/strong\u003e — which means strength and durability for demanding use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 2700 PSI (steel, 1\/2\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction\u003c\/strong\u003e — which means corrosion resistance for water, air, and many fluids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton (FKM) seal\u003c\/strong\u003e — which means compatibility with a wide range of fuels, oils, and chemicals at high temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton (FKM) seal\u003c\/strong\u003e — which means compatibility with a wide range of fuels, oils, and chemicals at high temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. 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Hg maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -40F to +250F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e ANSI\/B93.2, 4:1 safety factor\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\u003eStraight-thru, no valve\u003c\/strong\u003e — which means unrestricted full flow with minimal pressure drop, ideal for air, fluid transfer, and vacuum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame ID as nominal pipe\u003c\/strong\u003e — which means the coupling does not choke your line, maximizing flow and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard industrial interchange\u003c\/strong\u003e — which means it couples with the most widely used industrial coupler design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 stainless steel\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does straight-thru mean?\u003c\/strong\u003e\u003cbr\u003eThere is no shut-off valve in either the socket or the plug, so the coupling flows as freely as the pipe — maximum flow, minimal pressure drop. Note: lines do not self-seal on disconnect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this connect to?\u003c\/strong\u003e\u003cbr\u003eStandard industrial interchange — only same-size FST sockets and plugs couple together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 3000 PSI (303 stainless steel, 1\/2\"), per ANSI\/B93.2, 4:1 safety factor.\u003c\/p\u003e\u003cp\u003eIdeal for high-flow air, fluid transfer, and vacuum lines where shut-off is not needed. 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