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.

Stainless steel camlock Coupler Type D – female coupler by female NPT/BSP thread, is typically used with Type A adapters but also can be used with Type E, F & DP (Dust Plug) of the same size. Made of stainless steel 316, stainless steel couplings are used by chemical industry, food & sanitary environments & water treat factories.
Heavy duty stainless steel quick hose couplings are ideal for suction hoses which carry chemicals, food liquids, coolants & hydraulic oils under low pressure.