Aluminum 3" Male Camlock x 4" Male NPT Camlock Size_1/2 inch It is made out of

It is made out of polycarbonate with a brass stem in the middle

For fire hydrants located on open decks or cargo decks

Black 2 inch heavy-duty camlock rubber water suction and discharge hose

Double jacket hose with any color treatment is the most durable hose available

Aluminum 3" Male Camlock x 4" Male NPT Camlock Size_1/2 inch It is made out ofGlobal type "F" aluminum 3 inch male camlock (Cam & Groove) coupler to 4 inch male NPT threads. Under no circumstances should cam and groove couplings be used for compressed air or steam service! Note: Image is example only and may not match dimensions of actual product. Connections The male side of this adapter will only connect to 3 inch female camlock The male threaded side of this adapter will only connect to a 4 inch female National Pipe Straight