BSP (British Standard Pipe) are usually a combination of BSPT (British Standard Pipe Taper) threads for male threaded fittings and BSPP (British Standard Pipe Parallel) threads for female threaded fittings. This ensures a locking occurs between the mating surfaces. NPT (National Pipe Thread) is an American standard pipe thread. BSP and NPT are not interchangeable.
A wide range of grade 316 Stainless Steel fittings are available in both BSP and NPT thread forms including Hex Nipples, Weld Nipples, Barrel Nipples, Hex Plugs, Caps, Sockets and Elbow Fittings. Tees, Adapters and Reducers as well as Unions and BSP Ball Valves.