SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting
SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting
SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting
SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting
SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting
SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting
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SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe FittingSS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe FittingSS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe FittingSS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe FittingSS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe FittingSS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting

SS304 BSP Threaded Weld Nipple 100mm | 1/4" to 4" Pipe Fitting

HomeDIYer
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$4.00 USD
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In stock (500 units), ready to be shipped

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Description

 

SS304 BSP Threaded Weld Nipple 100mm — One-End Thread, One-End Weld Pipe Connector

Plumbers, 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.

Each 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.

Typical 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.

🔗 Compatibility: Fits standard BSP (British Standard Pipe) threaded fittings, valves, and couplings — DN8 (1/4") through DN100 (4"). Not directly compatible with NPT threads. Confirm your system uses BSP before ordering.

✅ Key Features of These SS304 BSP Threaded Weld Nipples

  • 🔩 One-End BSP Thread, One-End Plain Bore — 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.
  • 🦾 Grade 304 Stainless Steel Construction — 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.
  • 📏 Wide Size Range: DN8 to DN100 — 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.
  • 📐 Fixed 100mm Working Length — 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.
  • 📦 Flexible Pack Quantities (1 / 3 / 5 pcs) — 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.
  • 🏭 Machined Threads for Consistent Fit — 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.

📐 Technical Specifications — BSP Threaded Weld Nipple

Product Type Weld Nipple (Threaded One End, Plain One End)
Material Stainless Steel Grade 304 (SS304)
Thread Standard BSP (British Standard Pipe)
Thread Sizes Available DN8 (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")
Overall Length 100mm (≈3.94")
Thread End BSP threaded (male)
Plain End Unthreaded — suitable for socket or butt welding
Wall Thickness See variant options (varies by DN size)
Outer Diameter See variant options (varies by DN size)
Surface Finish Mill finish / natural stainless
Working Pressure Contact us to confirm (depends on size and installation)
Temperature Range Generally suitable for -20°C to 400°C (-4°F to 752°F) — contact us to confirm for your application
Pack Quantities 1 pcs / 3 pcs / 5 pcs
Ships From US Warehouse
⚠️ Note: 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.

❓ Frequently Asked Questions

How do I choose the right thread size for my pipe system?

Match 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.

What pressure rating can these weld nipples handle?

SS304 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.

Are these nipples suitable for outdoor or marine use?

Grade 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.

Is the thread on one end or both ends?

These 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.

Will BSP threads fit NPT fittings?

BSP 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.

Should I buy 1, 3, or 5 pieces?

The 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.

What welding method is recommended for the plain end?

TIG (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.

🛒 Select your thread size and pack quantity above, then add to cart — ships from our US warehouse.

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