{"title":"Foster ISO-B Series Couplers","description":"\u003cp\u003eFoster ISO-B (FHK) Series hydraulic quick couplers and plugs, compatible with ISO 7241-1 Series B — the most widely used industrial hydraulic interchange. Two-way shut-off seals both halves at disconnect to prevent fluid loss and air inclusion. Manual sleeve connection at zero pressure. Body sizes 1\/8\" to 1\", in RoHS-plated steel, brass, and 303\/316 stainless with Buna-N seals.\u003c\/p\u003e","products":[{"product_id":"foster-blh1b-iso-b-series","title":"Foster BLH1B, 1\/8\" ISO-B Hydraulic Coupler x 1\/8\" Female NPT, ISO-B Series, Ball Lock, Brass","description":"\u003cp\u003eReliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster \u003cstrong\u003eBLH1B\u003c\/strong\u003e is a brass 1\/8\" coupler from the ISO-B Series (Foster FHK \/ Breco DS), compatible with ISO 7241-1 Series B couplings and rated to 3000 PSI. Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH1B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/8\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\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 3000 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\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\u003eISO 7241-1 Series B compatible\u003c\/strong\u003e — which means it couples with the industry-standard Series B interchange used across hydraulic equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-way shut-off\u003c\/strong\u003e — which means both the socket and plug seal at disconnect, preventing oil loss and keeping contaminants out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect\/disconnect at zero pressure\u003c\/strong\u003e — which means safer operation and longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass with double O-ring seals\u003c\/strong\u003e — which means corrosion resistance for water and marine media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall lock sleeve\u003c\/strong\u003e — which means it locks against accidental disconnect under vibration or load.\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 is compatible with ISO 7241-1 Series B couplings — the most common hydraulic interchange. Only same-size Series B plugs will couple.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 3000 PSI maximum working pressure (coupled, non-shock, 4:1 safety factor).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it leak when disconnected?\u003c\/strong\u003e\u003cbr\u003eNo — the two-way shut-off seals both the socket and the plug at disconnect, preventing fluid loss.\u003c\/p\u003e\u003cp\u003eIdeal for hydraulic power units, construction and agricultural equipment, and any line that must disconnect clean. Pair this coupler with a matching 1\/8\" ISO 7241-1 Series B plug.\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":45530349207599,"sku":"FOST BLH1B (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-blh1s-iso-b-series","title":"Foster BLH1S, 1\/8\" ISO-B Hydraulic Coupler x 1\/8\" Female NPT, ISO-B Series, Ball Lock, Plated Steel","description":"\u003cp\u003eReliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster \u003cstrong\u003eBLH1S\u003c\/strong\u003e is a plated steel 1\/8\" coupler from the ISO-B Series (Foster FHK \/ Breco DS), compatible with ISO 7241-1 Series B couplings and rated to 4000 PSI. Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH1S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/8\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plated 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 4000 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\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\u003eISO 7241-1 Series B compatible\u003c\/strong\u003e — which means it couples with the industry-standard Series B interchange used across hydraulic equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-way shut-off\u003c\/strong\u003e — which means both the socket and plug seal at disconnect, preventing oil loss and keeping contaminants out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect\/disconnect at zero pressure\u003c\/strong\u003e — which means safer operation and longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened steel from solid bar stock\u003c\/strong\u003e — which means maximum resistance to hydraulic and mechanical shock for long life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall lock sleeve\u003c\/strong\u003e — which means it locks against accidental disconnect under vibration or load.\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 is compatible with ISO 7241-1 Series B couplings — the most common hydraulic interchange. Only same-size Series B plugs will couple.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 4000 PSI maximum working pressure (coupled, non-shock, 4:1 safety factor).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it leak when disconnected?\u003c\/strong\u003e\u003cbr\u003eNo — the two-way shut-off seals both the socket and the plug at disconnect, preventing fluid loss.\u003c\/p\u003e\u003cp\u003eIdeal for hydraulic power units, construction and agricultural equipment, and any line that must disconnect clean. Pair this coupler with a matching 1\/8\" ISO 7241-1 Series B plug.\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":45530349240367,"sku":"FOST BLH1S (1)","price":24.09,"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-blh1s-s-iso-b-series","title":"Foster BLH1S\/S, 1\/8\" ISO-B Hydraulic Coupler x 1\/8\" Female NPT, ISO-B Series, Ball Lock, 303 Stainless Steel","description":"\u003cp\u003eReliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster \u003cstrong\u003eBLH1S\/S\u003c\/strong\u003e is a 303 stainless steel 1\/8\" coupler from the ISO-B Series (Foster FHK \/ Breco DS), compatible with ISO 7241-1 Series B couplings and rated to 5000 PSI. Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH1S\/S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/8\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\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 5000 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\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\u003eISO 7241-1 Series B compatible\u003c\/strong\u003e — which means it couples with the industry-standard Series B interchange used across hydraulic equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-way shut-off\u003c\/strong\u003e — which means both the socket and plug seal at disconnect, preventing oil loss and keeping contaminants out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect\/disconnect at zero pressure\u003c\/strong\u003e — which means safer operation and longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e303 Stainless Steel construction\u003c\/strong\u003e — which means superior corrosion resistance for harsh and washdown environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall lock sleeve\u003c\/strong\u003e — which means it locks against accidental disconnect under vibration or load.\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 is compatible with ISO 7241-1 Series B couplings — the most common hydraulic interchange. Only same-size Series B plugs will couple.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 5000 PSI maximum working pressure (coupled, non-shock, 4:1 safety factor).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it leak when disconnected?\u003c\/strong\u003e\u003cbr\u003eNo — the two-way shut-off seals both the socket and the plug at disconnect, preventing fluid loss.\u003c\/p\u003e\u003cp\u003eIdeal for hydraulic power units, construction and agricultural equipment, and any line that must disconnect clean. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH1S4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/8\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 7\/16\"-20 SAE, SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plated 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 4000 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Only same-size Series B plugs will couple.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 4000 PSI maximum working pressure (coupled, non-shock, 4:1 safety factor).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it leak when disconnected?\u003c\/strong\u003e\u003cbr\u003eNo — the two-way shut-off seals both the socket and the plug at disconnect, preventing fluid loss.\u003c\/p\u003e\u003cp\u003eIdeal for hydraulic power units, construction and agricultural equipment, and any line that must disconnect clean. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH2B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/4\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/4\" 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 Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\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. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH2S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/4\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/4\" 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 Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plated 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 3700 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\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\u003eISO 7241-1 Series B compatible\u003c\/strong\u003e — which means it couples with the industry-standard Series B interchange used across hydraulic equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-way shut-off\u003c\/strong\u003e — which means both the socket and plug seal at disconnect, preventing oil loss and keeping contaminants out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect\/disconnect at zero pressure\u003c\/strong\u003e — which means safer operation and longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened steel from solid bar stock\u003c\/strong\u003e — which means maximum resistance to hydraulic and mechanical shock for long life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall lock sleeve\u003c\/strong\u003e — which means it locks against accidental disconnect under vibration or load.\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 is compatible with ISO 7241-1 Series B couplings — the most common hydraulic interchange. Only same-size Series B plugs will couple.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated for?\u003c\/strong\u003e\u003cbr\u003eRated to 3700 PSI maximum working pressure (coupled, non-shock, 4:1 safety factor).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it leak when disconnected?\u003c\/strong\u003e\u003cbr\u003eNo — the two-way shut-off seals both the socket and the plug at disconnect, preventing fluid loss.\u003c\/p\u003e\u003cp\u003eIdeal for hydraulic power units, construction and agricultural equipment, and any line that must disconnect clean. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH2S\/S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/4\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/4\" 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 Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\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 3700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH3S\/S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/8\" ISO 7241-1 Series B\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 Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\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 3700 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BLH6B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 3\/4\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 3\/4\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 3\/4\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Ball Lock - rotate sleeve to lock against accidental disconnect\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 2000 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e H1BLV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/8\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve:\u003c\/strong\u003e Less Valve (straight-thru, free 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 3000 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e H1S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/8\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/8\" Coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e 1\/8\" Female NPT, FPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plated 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 4000 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Service:\u003c\/strong\u003e 27 in. 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Valves in both halves shut off at disconnect to prevent fluid loss and air inclusion.\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 ISO-B (FHK \/ DS, ISO 7241-1 Series B)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e H2B-102\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchange:\u003c\/strong\u003e 1\/4\" ISO 7241-1 Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e 1\/4\" 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 Two-Way Shut-Off (both halves seal at disconnect)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Manual sleeve (retract to connect and disconnect at zero pressure)\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 Neoprene\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. 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