Aluminum 4" Female BSP to 4" Male NPT Material_Aluminum Equivalent part number - FM15F25F

Equivalent part number - FM15F25F

check the female coupling for numbers or letters

and sealant is provided to help secure the male and female connection

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

NPSH and NPT threads are more common in industrial applications vs the more common NH/NST used in most fire applications

Aluminum 4" Female BSP to 4" Male NPT Material_Aluminum Equivalent part number - FM15F25FBritish 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.