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 5990-01-131-2008
NSN 6320-00-701-0437
NSN 6240-01-633-9357
NSN 6645-01-495-0939
NSN 6130-00-318-9246
NSN 5855-01-430-0132
NSN 5999-00-153-0917
NSN 5990-00-177-2924
NSN 5920-01-649-7252
NSN 6110-01-317-4830
NSN 5998-01-421-3503
NSN 5975-01-431-4347