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 adapter Type E - Male Adaptor by Hose Tail, is typically used with Type C, B, D and Dust Cap couplers of the identical size. Heavy duty stainless steel camlocks connects the hose to the tank, pump or other equipment quickly and safely. Stainless steel quick hose couplings are ideal for chemicals, coolants, hydraulic oils, salt water and other corrosive materials. In food or sanitary applications, stainless steel cam lock is always the first option for it will not contaminate the media to be carried.