An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5990-00-081-3937
NSN 5915-01-130-4965
NSN 5950-01-462-0677
NSN 6610-01-065-6057
NSN 6135-00-107-6662
NSN 7035-00-312-3055
NSN 5999-01-228-8193
NSN 5985-00-015-7482
NSN 5990-01-424-2954
NSN 6620-00-251-0569
NSN 5950-01-377-7595
NSN 6240-01-457-3372