{"product_id":"stainless-steel-bsp-pipe-fittings-socket-hex-plug-cap","title":"Stainless Steel BSP Pipe Fittings – Socket Plug, Hex Plug \u0026 Hex Cap 1\/4\" to 2\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003c!-- ① OVERVIEW --\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eStainless Steel BSP Pipe Fittings — Seal Unused Ports with Confidence\u003c\/h2\u003e\n\u003cp\u003eWhen you need to cap off an open pipe port, block an unused hydraulic outlet, or pressure-test a plumbing line, the wrong fitting can mean leaks, corrosion, or a failed inspection. Plumbers, pipefitters, maintenance engineers, and serious DIYers all face the same challenge: finding a reliable, corrosion-resistant BSP pipe plug or cap that installs cleanly and holds under pressure.\u003c\/p\u003e\n\u003cp\u003eThis listing covers three types of 304 stainless steel BSP pipe end fittings — \u003cstrong\u003eSocket Plug\u003c\/strong\u003e, \u003cstrong\u003eHex Plug\u003c\/strong\u003e, and \u003cstrong\u003eHex Cap\u003c\/strong\u003e — available in sizes from \u003cstrong\u003e1\/4\" (DN8)\u003c\/strong\u003e to \u003cstrong\u003e2\" (DN50)\u003c\/strong\u003e. All fittings are machined from 304 stainless steel and carry BSP (British Standard Pipe) parallel threads. Each listing is sold individually (1 pc per order); select your type and size from the variant options above.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include sealing spare ports on hydraulic manifolds and pneumatic valve blocks, capping unused branch connections on water and steam pipelines, blocking pipe ends during pressure testing of plumbing systems, and closing off gas line tees in industrial and commercial installations — all scenarios where a stainless steel BSP pipe plug or end cap is the go-to solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ② COMPATIBILITY BAR --\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eThread Standard:\u003c\/strong\u003e BSP (BSPP \/ G Thread — Parallel). Compatible with standard BSP female ports and male pipe ends. \u003cstrong\u003eNot compatible with NPT threads.\u003c\/strong\u003e Sizes: 1\/4\" · 3\/8\" · 1\/2\" · 3\/4\" · 1\" · 1-1\/4\" · 1-1\/2\" · 2\".\u003c\/div\u003e\n\u003c!-- ③ KEY FEATURES --\u003e\n\u003ch2\u003e✅ Key Features of These Stainless Steel BSP Pipe Plugs and Caps\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eThree Head Styles in One Listing\u003c\/strong\u003e — Choose Socket Plug (internal hex drive, low-profile flush fit), Hex Plug (external hex, wrench-tightened), or Hex Cap (female BSP thread caps over a male pipe end) — all in the same 304 stainless steel construction.\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 — Resists rust, oxidation, and mild chemical exposure, making these fittings suitable for water lines, steam systems, and outdoor plumbing applications where carbon steel plugs would corrode.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFull BSP Size Range 1\/4\" to 2\"\u003c\/strong\u003e — Eight sizes per type cover the most common nominal pipe sizes in BSP plumbing and hydraulic systems, from small instrument ports (1\/4\" DN8) up to large-bore industrial lines (2\" DN50).\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMachined BSP Parallel Threads\u003c\/strong\u003e — Threads are cut to BSP (BSPP\/G) standard for consistent engagement with standard BSP fittings and ports; use with PTFE tape or thread sealant for a leak-free stainless steel pipe thread seal.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e — Suitable for hydraulic manifolds, pneumatic systems, water and steam pipelines, gas distribution lines, and pressure-test blanking — anywhere a reliable BSP pipe end fitting is required.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSold Individually for Flexible Ordering\u003c\/strong\u003e — Each unit is sold as 1 pc, so you can order exactly the quantity you need without being locked into bulk packs — practical for maintenance stock, repair jobs, or single-port sealing tasks.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n\u003ch2\u003e📐 Technical Specifications — BSP Stainless Steel Pipe Plugs \u0026amp; Caps\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)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eBSP — BSPP \/ G Thread (Parallel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Types\u003c\/th\u003e\n\u003ctd\u003eSocket Plug (internal hex) · Hex Plug (external hex) · Hex Cap (female BSP, caps male pipe end)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e1\/4\" · 3\/8\" · 1\/2\" · 3\/4\" · 1\" · 1-1\/4\" · 1-1\/2\" · 2\" (DN8–DN50)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style (Socket Plug)\u003c\/th\u003e\n\u003ctd\u003eInternal hex (Allen key \/ hex wrench)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style (Hex Plug)\u003c\/th\u003e\n\u003ctd\u003eExternal hex head (open-end wrench or spanner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style (Hex Cap)\u003c\/th\u003e\n\u003ctd\u003eExternal hex body (wrench-applied over male pipe end)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural stainless steel (brushed\/machined)\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 and wall thickness; contact us to confirm for critical applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for -196°C to 800°C (304 SS); confirm for your specific media and pressure\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\u003eThread Sealant Required\u003c\/th\u003e\n\u003ctd\u003eYes — PTFE tape or thread sealant compound recommended for parallel BSP threads\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\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eConfirm thread standard before ordering.\u003c\/strong\u003e BSP (BSPP\/G) threads are parallel and are \u003cem\u003enot\u003c\/em\u003e interchangeable with NPT (tapered) threads. If your system uses NPT, please contact us before purchasing.\u003c\/div\u003e\n\u003c!-- ⑤ FAQ --\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size BSP pipe plug or cap?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the fitting size to your pipe's nominal BSP thread size. For example, a 1\/2\" BSP plug fits a 1\/2\" BSP female port. Sizes in this listing range from 1\/4\" (DN8) to 2\" (DN50). When in doubt, measure the thread OD and compare to a BSP thread chart — a 1\/2\" BSP thread is typically about 20.9 mm (≈0.82\") OD, and a 1\" BSP thread is typically about 33.2 mm (≈1.31\") OD. Always verify against your system's documentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a Socket Plug, Hex Plug, and Hex Cap?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA \u003cstrong\u003eSocket Plug\u003c\/strong\u003e (internal hex plug) is driven with an Allen\/hex key inserted into a recessed socket on the top face — ideal where a low-profile or flush finish is needed and clearance for a wrench is limited. A \u003cstrong\u003eHex Plug\u003c\/strong\u003e has an external hex head and is tightened with an open-end wrench or spanner — the most common choice for general plumbing and hydraulic port sealing. A \u003cstrong\u003eHex Cap\u003c\/strong\u003e has a female BSP thread on the inside and threads \u003cem\u003eover\u003c\/em\u003e a male pipe end to seal it, rather than threading into a female port — used when you need to cap the end of a male-threaded pipe or nipple.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these 304 stainless steel pipe fittings under pressure?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel generally has a tensile strength of around 515 MPa (≈75,000 psi) and a yield strength of approximately 205 MPa (≈30,000 psi). Working pressure capacity depends on the specific size and wall thickness — smaller sizes typically handle higher pressures than larger sizes. For safety-critical or high-pressure applications, always verify the rated working pressure for your specific size variant and consult a qualified engineer or pipefitter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these fittings suitable for outdoor use or corrosive environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, generally. 304 stainless steel provides good corrosion resistance in most outdoor and mildly corrosive environments, including exposure to fresh water, humidity, and many common chemicals. It is widely used in food processing, plumbing, and light industrial applications. However, for highly chlorinated environments, marine\/saltwater exposure, or aggressive chemical media, 316 stainless steel is typically recommended for its superior chloride resistance. Contact us if you need 316 SS options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre BSP threads the same as NPT threads — can I use these in an NPT system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo — BSP and NPT are different thread standards and are \u003cstrong\u003enot directly interchangeable\u003c\/strong\u003e. BSP (BSPP\/G) threads are parallel, while NPT threads are tapered. The thread pitch and angle also differ. If your system uses NPT ports or pipe ends, you will need a BSP-to-NPT adapter fitting. If you are unsure which standard your system uses, check your equipment's documentation or measure the thread profile before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\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\u003eYes, for BSPP (parallel) threads, a thread sealant is generally required to achieve a leak-free seal — parallel threads do not self-seal by taper the way NPT threads do. Apply PTFE tape clockwise (2–3 wraps) around the male thread before assembly, or use a compatible thread sealant compound. Always follow the pressure rating and fluid compatibility requirements of your specific application. Do not overtighten stainless steel fittings, as galling can occur.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are the most common applications for BSP stainless steel pipe plugs and caps?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese BSP stainless steel pipe end fittings are commonly used to: seal unused ports on hydraulic manifolds and pneumatic valve blocks; cap spare branch connections on water, steam, or gas pipelines; blank off pipe ends during pressure testing and commissioning; close off instrumentation tapping points; and provide permanent or semi-permanent port sealing in food-grade, marine, and industrial plumbing systems where corrosion resistance is important.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c!-- ⑥ CTA BAR --\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003etype and size\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"304 stainless steel \/ Socket Plug【1\u00264\"】 \/ 1pcs","offer_id":52336738205970,"sku":"BEAR026537x1","price":7.82,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Socket Plug【3\u00268\"】 \/ 1pcs","offer_id":52336738238738,"sku":"BEAR026538x1","price":8.28,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Socket Plug【1\u00262\"】 \/ 1pcs","offer_id":52336738271506,"sku":"BEAR026539x1","price":9.04,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Socket Plug【3\u00264\"】 \/ 1pcs","offer_id":52336738304274,"sku":"BEAR026540x1","price":11.68,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Socket Plug【1\"】 \/ 1pcs","offer_id":52336738337042,"sku":"BEAR026541x1","price":19.16,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Socket Plug【1-1\u00264\"】 \/ 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1pcs","offer_id":52336738763026,"sku":"BEAR026554x1","price":8.36,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Hex Cap【1\u00262\"】 \/ 1pcs","offer_id":52336738795794,"sku":"BEAR026555x1","price":9.04,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Hex Cap【3\u00264\"】 \/ 1pcs","offer_id":52336738828562,"sku":"BEAR026556x1","price":14.08,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Hex Cap【1\"】 \/ 1pcs","offer_id":52336738861330,"sku":"BEAR026557x1","price":16.85,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Hex Cap【1-1\u00264\"】 \/ 1pcs","offer_id":52336738894098,"sku":"BEAR026558x1","price":25.01,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Hex Cap【1-1\u00262\"】 \/ 1pcs","offer_id":52336738926866,"sku":"BEAR026559x1","price":31.81,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ Hex Cap【2\"】 \/ 1pcs","offer_id":52336738959634,"sku":"BEAR026560x1","price":50.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_56dfc7a4-fa95-427d-ae11-49a59bf44947.jpg?v=1781157721","url":"https:\/\/homediyer.com\/products\/stainless-steel-bsp-pipe-fittings-socket-hex-plug-cap","provider":"HomeDIYer","version":"1.0","type":"link"}