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 5945-01-660-7299
NSN 5835-01-515-6537
NSN 5965-01-258-1988
NSN 5975-01-083-9186
NSN 5999-01-052-1646
NSN 5920-01-426-8517
NSN 5920-00-246-2187
NSN 5960-01-359-4257
NSN 6650-01-379-0601
NSN 6220-00-674-4008
NSN 5996-01-014-2806
NSN 6105-01-653-2554