304 Stainless Steel BSP Hex End Cap Female Thread Pipe Fitting 150LB

Match the cap size to your pipe's nominal bore (DN number). BSP sizing is based on the internal diameter of the pipe, not the thread outer diameter. For example, a BSP 1/2" cap (DN15) fits a pipe with roughly 15mm (≈5/8") internal bore. Always verify the thread size stamped on your existing fitting or pipe before ordering. If in doubt, measure the OD of the male thread and compare to a BSP thread chart.

These fittings are rated at 150 LB, which generally corresponds to approximately 150 PSI working pressure at ambient temperature for water service. Actual safe working pressure may be lower at elevated temperatures or with certain media. For high-pressure or high-temperature applications, consult a qualified engineer before installation.

Yes. 304 stainless steel offers good corrosion resistance in most outdoor and wet environments, including fresh water, mild chemicals, and humid conditions. It is generally suitable for outdoor plumbing and light industrial use. For marine environments or systems with high chloride exposure, 316 stainless steel is typically recommended for better corrosion resistance.

No. BSP (British Standard Pipe) and NPT (National Pipe Thread) are not interchangeable. BSP threads follow ISO 7/1 with a 55° thread angle, while NPT uses a 60° thread angle. Mixing the two can result in cross-threading, leaks, or fitting damage. Always confirm your pipe system uses BSP threads before purchasing.

For a reliable, leak-free seal — especially in liquid or gas service — PTFE tape or a compatible thread sealant compound is generally recommended. Apply sealant to the male threads of the pipe before threading on the cap. Do not over-tighten: hand-tight plus 1–2 turns with a wrench is typically sufficient for most BSP female thread pipe cap installations.

The hexagonal body allows installation with a standard open-end wrench or adjustable wrench — no special tools required. The flat hex faces provide a secure grip and help prevent rounding during tightening. For larger sizes (DN32 and above), a pipe wrench or larger adjustable wrench may be more comfortable to use.

A hex end cap has female (internal) threads and fits over the outside of a male-threaded pipe end to seal it. A hex plug has male (external) threads and screws into a female-threaded port or socket. Choose a cap when your pipe end has male (external) threads; choose a plug when you need to close a female-threaded port or fitting.

304 stainless steel is widely used in potable water systems and is generally considered safe for drinking water contact in most jurisdictions. However, local plumbing codes and certifications (such as NSF/ANSI 61) may apply depending on your region. Check your local regulations to confirm compliance requirements for your specific installation.