Camlocks are used to rapidly connect and disconnect fitting on piping or hose, they come in a variety of materials to be used with different liquids and a variety of sizes to accommodate hose or piping diameter. Camlocks usually come in 6 different styles: Type "A", has a male grooved adapter and a female pipe thread (BSP or NPT thread) of the same size. Type "B", has a female camlock end and a male pipe thread of the same size. Type "C", has a female camlock on one end and a male hose tail on the other. Type "D", has a female camlock end and a female pipe thread of the same size. Type "E", has a male camlock on one end and a male hose tail on the other. Type "F", has a male grooved adaptor and a male pipe thread of the same size.