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 6620-01-412-5514
NSN 6130-01-145-4924
NSN 5855-01-266-1645
NSN 5910-00-202-1056
NSN 6620-01-519-2628
NSN 5999-00-249-7016
NSN 6645-01-553-8500
NSN 5965-00-150-1144
NSN 5895-01-477-5494
NSN 5965-00-513-1352
NSN 6150-00-518-4558
NSN 5835-01-424-0054