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 B – female coupler by male thread, can fits into any male camlock fitting of the same size including Type F, A, E & DP (Dust Plug). Quick hose camlock couplings can connect/disconnect hose to tanks, pumps or other equipment in a faster way in contrast with conventional fitting such as threads and flanges.
Owing to its excellent corrosive resistance, high temperature ability and sanitary features, stainless steel camlock fittings are often used in food processing and harsh working environments. Stainless steel couplings will not act with seawater, coolants, fuels and foods in liquid or powder status. Type B couplers are interchangeable except 1/2" which has no international specifications.