{"product_id":"stainless-steel-201-bsp-male-thread-weld-nipple-pipe-fitting","title":"Stainless Steel 201 Male Thread Weld Nipple BSP 100–500mm Pipe Fitting","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eStainless Steel Male Thread Weld Nipple — Reliable BSP Pipe Extension for Plumbing \u0026amp; Industrial Use\u003c\/h2\u003e\n\u003cp\u003eWhen you need to extend a pipe run, connect a valve to a vessel wall, or bridge a gap in a tight plumbing layout, a poorly fitted nipple can mean leaks, rework, and downtime. These \u003cstrong\u003estainless steel 201 BSP male thread weld nipples\u003c\/strong\u003e are built for plumbers, pipefitters, fabricators, and DIY enthusiasts who need a dependable, weldable pipe extension in a range of lengths.\u003c\/p\u003e\n\u003cp\u003eEach piece is a single weld nipple machined from \u003cstrong\u003estainless steel 201\u003c\/strong\u003e with a BSP male thread on one end and a plain weld end on the other. Available in three thread diameters — \u003cstrong\u003e1\/2\" (M1\u0026amp;2\")\u003c\/strong\u003e, \u003cstrong\u003e3\/4\" (M3\u0026amp;4\")\u003c\/strong\u003e, and \u003cstrong\u003e1\" (M1\")\u003c\/strong\u003e — and six lengths: \u003cstrong\u003e100mm (≈3.9\")\u003c\/strong\u003e, \u003cstrong\u003e150mm (≈5.9\")\u003c\/strong\u003e, \u003cstrong\u003e200mm (≈7.9\")\u003c\/strong\u003e, \u003cstrong\u003e300mm (≈11.8\")\u003c\/strong\u003e, \u003cstrong\u003e400mm (≈15.7\")\u003c\/strong\u003e, and \u003cstrong\u003e500mm (≈19.7\")\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThese weld nipples are well-suited for \u003cstrong\u003eresidential and commercial plumbing pipe extensions\u003c\/strong\u003e, \u003cstrong\u003eindustrial tank outlet connections\u003c\/strong\u003e, and \u003cstrong\u003ecustom fabrication projects\u003c\/strong\u003e where a threaded-to-welded transition is needed. The BSP male thread end connects directly to standard female BSP valves, elbows, and couplings, making integration into existing systems straightforward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e BSP (British Standard Pipe) male thread — fits standard BSP female threaded fittings, valves, and couplings. Thread sizes: 1\/2\", 3\/4\", 1\". Weld end suits standard pipe OD for the corresponding nominal size.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Stainless Steel Male Thread Weld Nipples\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBSP Male Thread One End\u003c\/strong\u003e — Standard BSP male thread connects directly to female BSP valves, couplings, and elbows without adapters, simplifying stainless steel pipe fitting installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWeldable Plain End\u003c\/strong\u003e — The opposite end is left plain for butt welding directly into pipe runs or vessel walls, creating a permanent, leak-resistant joint in fabrication and industrial piping projects.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSix Length Options\u003c\/strong\u003e — Choose from 100mm to 500mm to match your exact pipe extension requirement, reducing the need for additional couplings or filler pieces in custom plumbing layouts.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStainless Steel 201 Construction\u003c\/strong\u003e — Offers solid corrosion resistance for general indoor and outdoor plumbing environments, with good strength for moderate-pressure pipe systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eThree Thread Diameters\u003c\/strong\u003e — Available in 1\/2\", 3\/4\", and 1\" BSP to match the most common nominal pipe sizes used in residential plumbing and light industrial piping systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFabrication-Ready Finish\u003c\/strong\u003e — Smooth machined surface on the threaded section and clean weld-end cut make these nipples ready for immediate use in pipe fabrication, tank connections, and custom stainless steel pipework.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Stainless Steel BSP Male Thread Weld Nipple\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\u003eStainless Steel 201\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Type\u003c\/th\u003e\n\u003ctd\u003eBSP (British Standard Pipe) Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Sizes\u003c\/th\u003e\n\u003ctd\u003e1\/2\" (M1\u0026amp;2\"), 3\/4\" (M3\u0026amp;4\"), 1\" (M1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e100mm (≈3.9\"), 150mm (≈5.9\"), 200mm (≈7.9\"), 300mm (≈11.8\"), 400mm (≈15.7\"), 500mm (≈19.7\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnd Type\u003c\/th\u003e\n\u003ctd\u003eOne BSP male threaded end + one plain weld end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eMill \/ machined stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Rating\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece per variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003ePlumbing, industrial piping, tank connections, custom fabrication\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\u003eNote:\u003c\/strong\u003e Thread size refers to nominal BSP pipe size, not the actual outer diameter of the thread. Verify your existing fitting's BSP thread size before ordering. For high-pressure or food-grade applications, please contact us to confirm suitability.\u003c\/div\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 length for a weld nipple?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the gap between the two pipe ends or fittings you need to bridge. Add allowance for thread engagement on each end — generally 10–15mm per side. Available lengths are 100mm (≈3.9\"), 150mm (≈5.9\"), 200mm (≈7.9\"), 300mm (≈11.8\"), 400mm (≈15.7\"), and 500mm (≈19.7\"). When in doubt, size up — a longer nipple can be trimmed during fabrication.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these weld nipples use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese fittings use \u003cstrong\u003eBSP (British Standard Pipe) male threads\u003c\/strong\u003e, which are compatible with standard BSP female threaded fittings and valves commonly used in plumbing and industrial piping systems across the US, UK, Australia, and many other markets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these weld nipples be used outdoors or in wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Stainless steel 201 offers good corrosion resistance for general outdoor and wet-environment use. For highly corrosive environments — such as coastal saltwater exposure or chemical processing — 304 or 316 stainless steel is generally recommended. Contact us if you need an upgraded grade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the pressure rating of these pipe nipples?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePressure ratings depend on pipe diameter, wall thickness, and installation method. Stainless steel 201 weld nipples are typically suitable for moderate-pressure plumbing and industrial applications. Contact us to confirm ratings for your specific use case before installation in high-pressure systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat sizes are available and how do I read the variant options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eVariants are listed as \u003cem\u003eThread Size × Length\u003c\/em\u003e. For example, \"M1\u0026amp;2\" × 100mm\" means a 1\/2\" BSP male thread nipple that is 100mm (≈3.9\") long. Available thread sizes are 1\/2\", 3\/4\", and 1\"; available lengths are 100mm, 150mm, 200mm, 300mm, 400mm, and 500mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is a weld nipple installed?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe plain end is welded directly into a pipe or vessel wall using standard TIG or MIG welding suitable for stainless steel. The male-threaded end then accepts a BSP female fitting such as a valve, elbow, or coupling. Apply PTFE tape or pipe thread sealant to the threaded connection to ensure a leak-free joint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs stainless steel 201 suitable for drinking water or food-grade applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStainless steel 201 is generally used in industrial and structural applications. For potable water or food-grade systems, 304 or 316 stainless steel is typically the recommended choice. Please confirm your application requirements before ordering, or contact us for alternative material options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003esize and length\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"25mm \/ 1PCS","offer_id":52336641999122,"sku":"GLFBTXJHYJJ00230x1","price":35.55,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 2PCS","offer_id":52336642031890,"sku":"GLFBTXJHYJJ00230x2","price":69.17,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 3PCS","offer_id":52336642064658,"sku":"GLFBTXJHYJJ00230x3","price":102.79,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 5PCS","offer_id":52336642097426,"sku":"GLFBTXJHYJJ00230x5","price":170.03,"currency_code":"USD","in_stock":true},{"title":"8mm \/ 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