Aluminum 4" Female BSP to 4" Male NPT Material_Aluminum check the female coupling for

check the female coupling for numbers or letters

Polyamide flow control ring with raised lugs for easy flow control adjustment under pressure

manufactured couplings as soon as we are able

High quality Red Head Brass chromed brass 1 1/2 inch NH/NST rocker lug cap with chain

Aluminum 4" Female BSP to 4" Male NPT Material_Aluminum check the female coupling forBritish Standard Pipe (BSP) can be most commonly found in Canada, UK, Europe, Asia and Australia. It is a finer thread than National Pipe Thread (NPT), and will not seal properly if used in conjunction with it. Two types of threads are used: British Standard Pipe Taper (BSPT) and British Standard Pipe Parallel (BSPP). British Standard Pipe Taper uses a tapered thread system, and sealant is provided to help secure the male and female connection.