{"product_id":"304-stainless-steel-bsp-female-end-cap-hollow-plug-pipe-fittings","title":"304 Stainless Steel BSP Female End Cap \u0026 Hollow Plug Pipe Fittings | 1\/8\" to 2\"","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between a BSP end cap and a BSP hollow plug?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A BSP female end cap threads onto a male pipe end and closes it off with a solid or recessed top — typically used when a clean, flush finish is needed. A BSP hollow plug (also called a hex plug) threads into a female port or fitting to seal it. Both serve to cap or block open pipe ends, but they mate with opposite thread types.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right BSP size for my pipe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"BSP sizes refer to the nominal bore of the pipe, not the actual thread outer diameter. For example, a 1\/2\\\" BSP fitting has an actual thread OD of approximately 20.9 mm (≈0.82\\\"). To confirm your size, measure the OD of the male thread or the ID of the female port and match it to a BSP thread chart. When in doubt, a 1\/2\\\" BSP fitting is the most common size in residential plumbing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these fittings suitable for outdoor or corrosive environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. 304 stainless steel offers good resistance to rust, oxidation, and mild corrosive agents, making it generally suitable for outdoor plumbing, marine-adjacent environments, and chemical exposure at moderate concentrations. For highly aggressive saltwater or acidic environments, 316 stainless steel is typically recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What pressure rating do these BSP end caps and plugs support?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"304 stainless steel BSP fittings of this type are generally rated for working pressures in the range of 150–3000 PSI depending on size and wall thickness. Smaller sizes typically handle higher pressures. Please contact us to confirm the rated pressure for your specific size before use in high-pressure hydraulic or pneumatic systems.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are BSP threads compatible with NPT (National Pipe Thread) fittings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No — BSP and NPT threads are not directly interchangeable. While some sizes appear similar in diameter, the thread pitch and angle differ (BSP uses a 55° Whitworth thread form; NPT uses a 60° thread form). Mixing them can result in cross-threading or leaks. Always verify the thread standard of your existing fittings before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need thread sealant (PTFE tape) with these fittings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For BSPT (tapered) threads, PTFE tape or thread sealant compound is generally recommended to ensure a leak-free seal. For BSPP (parallel) threads, a bonded seal washer or O-ring is typically used instead of tape. Check whether your port uses tapered or parallel BSP threads before installation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these be used in food-grade or potable water applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"304 stainless steel is widely used in food processing and potable water systems. However, compliance with local codes (such as NSF\/ANSI 61 in the US) depends on the full system configuration. We recommend verifying local regulatory requirements before installing in drinking water lines.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e304 Stainless Steel BSP End Caps \u0026amp; Hollow Plugs — Seal Open Pipe Ends Reliably\u003c\/h2\u003e\n    \u003cp\u003eWhether you're capping off an unused port on a hydraulic manifold, blanking a test point on an industrial pipeline, or sealing a spare outlet in a residential plumbing system, an open BSP thread is an invitation for leaks, contamination, and pressure loss. Plumbers, pipefitters, maintenance engineers, and serious DIYers all need a reliable, corrosion-resistant solution that threads on cleanly and holds under pressure.\u003c\/p\u003e\n    \u003cp\u003eEach piece in this listing is machined from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e — a chromium-nickel alloy known for its corrosion resistance and structural integrity. Two distinct types are available: \u003cstrong\u003eFemale End Caps\u003c\/strong\u003e (which thread onto an exposed male BSP pipe end) and \u003cstrong\u003eHollow Plugs\u003c\/strong\u003e (which thread into a female BSP port or fitting). Sizes range from \u003cstrong\u003e1\/8\" to 2\" BSP\u003c\/strong\u003e, covering the most common nominal pipe sizes used in plumbing, hydraulic, pneumatic, and industrial fluid systems. Sold individually (1 pc per order) so you can order exactly what you need.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include capping spare outlets on water manifolds, blanking unused ports on hydraulic cylinders and valve blocks, sealing test points on compressed air lines, and closing off pipe ends during pressure testing of plumbing rough-ins. Long-tail use cases include BSP pipe cap for water heater bypass, stainless steel hollow plug for hydraulic port, and BSP female end cap for compressed air system.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e\n    \u003cstrong\u003eThread Standard:\u003c\/strong\u003e BSP (British Standard Pipe) — compatible with BSPP (parallel) and BSPT (tapered) BSP ports. \u003cstrong\u003eNot compatible with NPT threads.\u003c\/strong\u003e Verify your fitting standard before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eSize Note:\u003c\/strong\u003e BSP nominal sizes refer to bore diameter, not thread OD. Measure your existing male thread OD or female port ID and cross-reference a BSP thread chart to confirm the correct size. Contact us if you need help selecting.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 304 Stainless Steel BSP End Caps \u0026amp; Hollow Plugs\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTwo Sealing Configurations\u003c\/strong\u003e — Available as a \u003cem\u003eFemale End Cap\u003c\/em\u003e (threads onto male BSP pipe end) or a \u003cem\u003eHollow Plug\u003c\/em\u003e (threads into female BSP port), giving you the right geometry for your specific application without adapters.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e304 Stainless Steel Construction\u003c\/strong\u003e — Chromium-nickel alloy resists rust, oxidation, and mild chemical exposure, making these fittings suitable for both indoor plumbing and outdoor or damp environments where carbon steel would corrode.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Size Range: 1\/8\" to 2\" BSP\u003c\/strong\u003e — Nine sizes cover the most common nominal pipe diameters used in residential, commercial, and light industrial BSP plumbing and hydraulic systems, from small instrument ports up to 2\" main lines.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eHex-Drive Design\u003c\/strong\u003e — The external hex profile on plugs and the hex flats on caps allow installation and removal with a standard wrench or socket, enabling controlled torque application and a secure, leak-resistant thread engagement.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSuitable for Fluid \u0026amp; Gas Systems\u003c\/strong\u003e — Designed for use in water, oil, compressed air, and hydraulic fluid lines. The machined thread form provides consistent engagement across the full BSP size range for reliable sealing in pressurized systems.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eReusable \u0026amp; Removable\u003c\/strong\u003e — Unlike permanent pipe caps or crimped fittings, these threaded end caps and plugs can be removed and reinstalled for system maintenance, pressure testing, or future line extensions without damaging the fitting or the port.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — BSP Stainless Steel End Cap \u0026amp; Hollow Plug\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e304 Stainless Steel (18-8 Chromium-Nickel Alloy)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eType Options\u003c\/th\u003e\n\u003ctd\u003eFemale End Cap \/ Hollow Plug (Hex Plug)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eBSP (British Standard Pipe) — BSPP \/ BSPT compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Sizes (Nominal)\u003c\/th\u003e\n\u003ctd\u003e1\/8\", 1\/4\", 3\/8\", 1\/2\", 3\/4\", 1\", 1-1\/4\", 1-1\/2\", 2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDrive \/ Installation Method\u003c\/th\u003e\n\u003ctd\u003eHex wrench \/ spanner (wrench flats on all sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBrushed \/ mill finish stainless (natural 304 SS)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003eSee variant options — varies by size; contact us to confirm for high-pressure use\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for -20°C to 200°C (≈-4°F to 392°F) — contact us to confirm for extreme conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Fluids\u003c\/th\u003e\n\u003ctd\u003eWater, hydraulic oil, compressed air, mild chemicals (verify for aggressive media)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between a BSP end cap and a BSP hollow plug?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA \u003cstrong\u003eBSP female end cap\u003c\/strong\u003e threads onto an exposed \u003cem\u003emale\u003c\/em\u003e BSP pipe end and closes it off — typically used when you have a pipe stub or nipple sticking out that needs to be capped. A \u003cstrong\u003eBSP hollow plug\u003c\/strong\u003e (hex plug) threads \u003cem\u003einto\u003c\/em\u003e a female BSP port or fitting to seal it from the inside. Both seal open pipe ends, but they mate with opposite thread types, so selecting the correct one depends on whether your open end is male or female.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the correct BSP size for my pipe or fitting?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eBSP nominal sizes refer to the \u003cem\u003ebore\u003c\/em\u003e (inside diameter) of the pipe, not the actual thread outer diameter. For example, a 1\/2\" BSP fitting has an actual thread OD of approximately 20.9 mm (≈0.82\"). To find your size: measure the OD of the male thread or the ID of the female port, then cross-reference a BSP thread chart. As a general guide:\u003c\/p\u003e\n        \u003cul class=\"hdiy-list\"\u003e\n          \u003cli\u003e1\/8\" BSP — thread OD typically ≈9.7 mm (≈3\/8\")\u003c\/li\u003e\n          \u003cli\u003e1\/4\" BSP — thread OD typically ≈13.2 mm (≈1\/2\")\u003c\/li\u003e\n          \u003cli\u003e1\/2\" BSP — thread OD typically ≈20.9 mm (≈13\/16\")\u003c\/li\u003e\n          \u003cli\u003e1\" BSP — thread OD typically ≈33.2 mm (≈1-5\/16\")\u003c\/li\u003e\n          \u003cli\u003e2\" BSP — thread OD typically ≈59.6 mm (≈2-11\/32\")\u003c\/li\u003e\n        \u003c\/ul\u003e\n        \u003cp\u003eIf you're unsure, contact us with your measurements and we'll help confirm the right size.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these fittings suitable for outdoor or corrosive environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes, generally. 304 stainless steel offers solid resistance to rust, atmospheric oxidation, and mild corrosive agents — making it suitable for outdoor plumbing, garden irrigation systems, and light industrial environments with moisture or mild chemical exposure. For highly aggressive environments such as direct saltwater immersion or concentrated acid\/chloride exposure, 316 stainless steel is typically recommended for better corrosion resistance.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat pressure can these BSP end caps and plugs handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003e304 stainless steel BSP fittings of this type are generally capable of handling working pressures in the range of \u003cstrong\u003e150 PSI to 3,000 PSI\u003c\/strong\u003e, depending on the nominal size and wall thickness — smaller sizes typically support higher pressures. For use in high-pressure hydraulic or pneumatic systems, please contact us with your specific size and application so we can confirm the rated working pressure before you order.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre BSP threads compatible with NPT fittings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003e\u003cstrong\u003eNo — BSP and NPT threads are not interchangeable.\u003c\/strong\u003e While some nominal sizes appear similar in diameter, the thread forms differ: BSP uses a 55° Whitworth thread angle, while NPT uses a 60° thread angle. The thread pitches also differ across sizes. Attempting to mate BSP and NPT threads can result in cross-threading, poor sealing, or fitting damage. Always verify the thread standard (BSP vs. NPT) of your existing ports before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need PTFE tape or thread sealant with these fittings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eIt depends on the BSP thread type in your system:\u003c\/p\u003e\n        \u003cul class=\"hdiy-list\"\u003e\n          \u003cli\u003e\n\u003cstrong\u003eBSPT (tapered BSP):\u003c\/strong\u003e PTFE thread seal tape or a thread sealant compound is generally recommended to achieve a leak-free seal, as the taper creates the seal through thread interference.\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eBSPP (parallel BSP):\u003c\/strong\u003e A bonded seal washer (dowty washer) or O-ring is typically used to seal the face of the fitting rather than the threads themselves. PTFE tape alone is usually not sufficient for parallel BSP.\u003c\/li\u003e\n        \u003c\/ul\u003e\n        \u003cp\u003eCheck whether your port uses tapered or parallel BSP threads before installation to choose the correct sealing method.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan these be used in potable water or food-grade applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003e304 stainless steel is widely used in food processing equipment and potable water infrastructure due to its corrosion resistance and non-reactive surface. However, compliance with specific standards such as NSF\/ANSI 61 (for drinking water system components) depends on the full system configuration and local regulatory requirements. We recommend verifying applicable codes with your local authority having jurisdiction (AHJ) before installing in drinking water lines.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your \u003cstrong\u003etype and size\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"304 stainless steel \/ Plug（1\u00268\"） \/ 1pcs","offer_id":52336593043730,"sku":"BEAR026499x1","price":4.98,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（1\u00264\"） \/ 1pcs","offer_id":52336593076498,"sku":"BEAR026500x1","price":4.98,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（3\u00268\"） \/ 1pcs","offer_id":52336593109266,"sku":"BEAR026501x1","price":5.14,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（1\u00262\"） \/ 1pcs","offer_id":52336593142034,"sku":"BEAR026502x1","price":5.49,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（3\u00264\"） \/ 1pcs","offer_id":52336593174802,"sku":"BEAR026503x1","price":7.15,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（1\"） \/ 1pcs","offer_id":52336593207570,"sku":"BEAR026504x1","price":8.35,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（1-1\u00264\"） \/ 1pcs","offer_id":52336593240338,"sku":"BEAR026505x1","price":10.83,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（1-1\u00262\"） \/ 1pcs","offer_id":52336593273106,"sku":"BEAR026506x1","price":13.41,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Plug（2\"） \/ 1pcs","offer_id":52336593305874,"sku":"BEAR026507x1","price":18.24,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（1\u00264\"） \/ 1pcs","offer_id":52336593338642,"sku":"BEAR026508x1","price":5.09,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（3\u00268\"） \/ 1pcs","offer_id":52336593371410,"sku":"BEAR026509x1","price":5.49,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（1\u00262\"） \/ 1pcs","offer_id":52336593404178,"sku":"BEAR026510x1","price":6.01,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（3\u00264\"） \/ 1pcs","offer_id":52336593436946,"sku":"BEAR026511x1","price":7.55,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（1\"） \/ 1pcs","offer_id":52336593469714,"sku":"BEAR026512x1","price":10.65,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（1-1\u00264\"） \/ 1pcs","offer_id":52336593502482,"sku":"BEAR026513x1","price":11.27,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（1-1\u00262\"） \/ 1pcs","offer_id":52336593535250,"sku":"BEAR026514x1","price":17.11,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Cap（2\"） \/ 1pcs","offer_id":52336593568018,"sku":"BEAR026515x1","price":22.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of23_fc2bc539-fe9b-4938-be83-7c43a3ca2487.jpg?v=1781069005","url":"https:\/\/homediyer.com\/products\/304-stainless-steel-bsp-female-end-cap-hollow-plug-pipe-fittings","provider":"HomeDIYer","version":"1.0","type":"link"}