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

Equivalent part number - FM15F25F

Lightweight aluminum construction designed for wildland firefighting

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

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

The most common fire hydrant outlet in the USA is 2 1/2 inches with NH / NST threads

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.