Brass 4" Female Camlock Dust Cap (USA) Swivel / Rigid_Rigid Female Water-Handling Accessories flow rates are

Water-Handling Accessories flow rates are 100 PSi flowing pressure

Type "A" aluminum 5 inch male camlock (Cam & Groove) coupler to 6 inch male camlock (Cam & Groove)

and allowing the engine to proceed for fire operations

It can even be referred to as NHT or National Hose Thread but NST or NH is more common these days

Female threads do not swivel

Brass 4" Female Camlock Dust Cap (USA) Swivel / Rigid_Rigid Female Water-Handling Accessories flow rates areType "DC" brass 4 inch female camlock (Cam & Groove) dust cap. Dust caps and dust plugs are not to be used in pressure applications for safety and environmental reasons. Under no circumstances should cam and groove couplings be used for compressed air or steam service! Connections The female side of this adapter will only connect to 4 inch male camlock WARNING: This product contains a chemical known to the State of California to cause birth defects or