National Pipe Thread Taper (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings. In contrast to straight threads that are found on a bolt, a taper thread will pull tight and therefore make a fluid-tight seal.

Type A stainless steel camlock couplings have male adaptors & female threads of the same size. The male grooved end can be inserted into any female couplers such as Type D, B, C & Dust Cap with identical size. Various gaskets are provided. Standard Buna-N, EPDM, PTFE, food grade silicone gaskets are used in different applications. Make sure the materials are compatible with the media to be transported. Low pressure stainless steel camlock couplings are very compatible with seawater, waste water, hydraulic fluids & coolants.