Aluminum 2 1/2" Male Camlock x 2 1/2" Male NPT (USA) Color_White Brass Female to Female Adapter

Brass Female to Female Adapter

The most common size and threads for US fire hydrants is 4 1/2 inch NH / NST

Brass couplings are almost never used in the fire service anymore

The male connector has a shape that allows the cams to lock into place

Aluminum 2 1/2" Male Camlock x 2 1/2" Male NPT (USA) Color_White Brass Female to Female AdapterType "F" aluminum 2 1 2 inch male camlock (Cam & Groove) coupler to 2 1 2 inch male NPT threads. Under no circumstances should cam and groove couplings be used for compressed air or steam service! Connections The male side of this adapter will only connect to 2 1 2 inch female camlock The male threaded side of this adapter will only connect to a 2 1 2 inch female National Pipe Tapered (NPT) or a National Pipe Straight Hose (NPSH) thread, for example,