{"product_id":"ss304-bsp-threaded-weld-nipple-100mm","title":"SS304 BSP Threaded Weld Nipple 100mm | 1\/4\" to 4\" Pipe Fitting","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003c!-- ① OVERVIEW --\u003e\n\u003ch2\u003eSS304 BSP Threaded Weld Nipple 100mm — One-End Thread, One-End Weld Pipe Connector\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003cp\u003ePlumbers, fabricators, and maintenance crews know the frustration of sourcing a reliable threaded-to-weld transition fitting that holds up under pressure without corroding in months. Whether you're building a water supply manifold, a compressed-air distribution line, or a chemical transfer system, a loose or rusted nipple can shut down an entire installation. These SS304 BSP threaded weld nipples are designed for exactly those demanding connections — giving you a solid BSP threaded interface on one end and a clean plain bore for welding on the other.\u003c\/p\u003e\n\u003cp\u003eEach piece is machined from Grade 304 stainless steel and measures 100mm (≈3.94\") in overall length. Thread sizes span DN8 through DN100, covering 1\/4\" BSP up to 4\" BSP, so you can match virtually any standard pipe run. Available in packs of 1, 3, or 5 pieces to suit single repairs or larger project builds.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include industrial fluid handling lines where a valve or instrument needs a permanent weld-in connection, residential and commercial plumbing manifolds requiring a BSP threaded stub, and food-grade or sanitary piping where stainless steel is specified. The 100mm length provides enough reach for most panel or bulkhead installations without excessive protrusion.\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\u003eCompatibility:\u003c\/strong\u003e Fits standard BSP (British Standard Pipe) threaded fittings, valves, and couplings — DN8 (1\/4\") through DN100 (4\"). \u003cstrong\u003eNot directly compatible with NPT threads.\u003c\/strong\u003e Confirm your system uses BSP before ordering.\u003c\/div\u003e\n\u003c!-- ③ KEY FEATURES --\u003e\n\u003ch2\u003e✅ Key Features of These SS304 BSP Threaded 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\u003eOne-End BSP Thread, One-End Plain Bore\u003c\/strong\u003e — The threaded end connects directly to BSP valves, couplings, or fittings; the plain end is prepared for socket or butt welding, creating a permanent, leak-resistant joint in your pipe system.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eGrade 304 Stainless Steel Construction\u003c\/strong\u003e — SS304 offers a strong balance of tensile strength and corrosion resistance, making it suitable for water, steam, mild chemicals, and food-contact applications 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: DN8 to DN100\u003c\/strong\u003e — Eleven thread sizes from 1\/4\" BSP up to 4\" BSP let you source the exact nipple for your pipe run without adapters or reducers, keeping your installation clean and flow-efficient.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eFixed 100mm Working Length\u003c\/strong\u003e — At 100mm (≈3.94\") overall, these nipples provide a consistent stub length for panel-mount, bulkhead, or manifold installations where a standardized reach is needed across multiple connection points.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eFlexible Pack Quantities (1 \/ 3 \/ 5 pcs)\u003c\/strong\u003e — Order a single piece for a spot repair, a 3-pack for a small manifold, or a 5-pack for larger installations — all at a per-unit price that scales with quantity, shipped from our US warehouse.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eMachined Threads for Consistent Fit\u003c\/strong\u003e — BSP threads are machined to standard tolerances, reducing the risk of cross-threading or poor sealing when mating with BSP-rated valves, gauges, or pipe fittings in industrial and plumbing systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n\u003ch2\u003e📐 Technical Specifications — BSP Threaded Weld Nipple\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eWeld Nipple (Threaded One End, Plain One End)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel Grade 304 (SS304)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eBSP (British Standard Pipe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Sizes Available\u003c\/th\u003e\n\u003ctd\u003eDN8 (1\/4\"), DN10 (3\/8\"), DN15 (1\/2\"), DN20 (3\/4\"), DN25 (1\"), DN32 (1-1\/4\"), DN40 (1-1\/2\"), DN50 (2\"), DN65 (2.5\"), DN80 (3\"), DN100 (4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Length\u003c\/th\u003e\n\u003ctd\u003e100mm (≈3.94\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread End\u003c\/th\u003e\n\u003ctd\u003eBSP threaded (male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlain End\u003c\/th\u003e\n\u003ctd\u003eUnthreaded — suitable for socket or butt welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003eSee variant options (varies by DN size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (varies by DN size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eMill finish \/ natural stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm (depends on size and installation)\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 400°C (-4°F to 752°F) — contact us to confirm for your application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e1 pcs \/ 3 pcs \/ 5 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShips From\u003c\/th\u003e\n\u003ctd\u003eUS Warehouse\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 Wall thickness and exact OD vary by DN size. If your application has specific dimensional requirements, please contact us before ordering to confirm the exact measurements for your chosen size.\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 thread size for my pipe system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the DN (nominal diameter) to your existing pipe size. The conversion is: DN8 = 1\/4\" BSP, DN10 = 3\/8\", DN15 = 1\/2\", DN20 = 3\/4\", DN25 = 1\", DN32 = 1-1\/4\", DN40 = 1-1\/2\", DN50 = 2\", DN65 = 2.5\", DN80 = 3\", DN100 = 4\". When in doubt, measure the outer diameter of your pipe and cross-reference a BSP pipe chart — the nominal size does not equal the actual OD.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pressure rating can these weld nipples handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSS304 weld nipples generally handle working pressures up to 150 PSI for standard plumbing applications. Actual ratings depend on installation quality, weld integrity, and the connected system. Contact us to confirm if your application requires a specific pressure certification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these nipples suitable for outdoor or marine use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGrade 304 stainless steel offers good corrosion resistance in most outdoor environments and performs well in freshwater, mild chemical, and general industrial settings. For highly saline or chloride-rich environments (e.g., coastal marine), SS316 is typically recommended instead. If you're unsure, contact us before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the thread on one end or both ends?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are weld nipples: one end is BSP threaded (male) for connection to a fitting, valve, or coupling, and the other end is plain (unthreaded) for welding directly to a pipe. This design allows a secure, leak-free permanent joint on the weld side while maintaining a removable threaded connection on the other.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill BSP threads fit NPT fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBSP and NPT threads are not directly interchangeable. BSP uses a parallel or tapered thread form (BSPP\/BSPT) while NPT uses a different taper angle and thread pitch. In some sizes they may appear to engage, but a proper pressure-tight seal is not guaranteed. Always use BSP-compatible fittings and valves for a reliable, leak-free connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I buy 1, 3, or 5 pieces?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 1-piece option is ideal for a single repair or testing a fit before committing to a larger order. The 3-piece pack suits small manifold builds or keeping a spare on hand. The 5-piece pack offers the best per-unit value for larger installations, maintenance kits, or when you need multiple connection points in the same size. All packs ship from our US warehouse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat welding method is recommended for the plain end?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eTIG (GTAW) welding is generally recommended for stainless steel pipe fittings to minimize heat distortion and maintain corrosion resistance at the weld zone. MIG welding is also used in less critical applications. Always use a filler rod compatible with SS304 and follow proper back-purging procedures to prevent oxidation inside the pipe bore.\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 thread size and pack quantity above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"DN8【1\u00264\"】 \/ 100mm \/ 1pcs","offer_id":52336714154258,"sku":"BEAR026625x1","price":4.0,"currency_code":"USD","in_stock":true},{"title":"DN8【1\u00264\"】 \/ 100mm \/ 3pcs","offer_id":52336714187026,"sku":"BEAR026625x3","price":10.21,"currency_code":"USD","in_stock":true},{"title":"DN8【1\u00264\"】 \/ 100mm \/ 5pcs","offer_id":52336714219794,"sku":"BEAR026625x5","price":16.48,"currency_code":"USD","in_stock":true},{"title":"DN10【3\u00268\"】 \/ 100mm \/ 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