NH couplings. USA coupling.
National Hose thread (NH) couplings, also known as National Standard Thread (NST). It is the most common type of fire hose coupling used in theUnited States. The male and female straight (non-tapered) threads screw together and the connection is sealed with a gasket.
NH Coupling include brass and aluminum NH couplings
NH couplings were used widely inCanada,USAand South American zone.
Main sizes include 1.5``,2`` and 2.5``.
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