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 5855-01-175-2465
NSN 5996-00-061-0336
NSN 6320-01-470-6826
NSN 5895-00-833-2525
NSN 5996-00-946-0291
NSN 5996-01-526-6120
NSN 6150-01-445-4845
NSN 5925-00-231-3660
NSN 5999-01-256-7333
NSN 5905-00-638-6776
NSN 6220-01-356-6775
NSN 6320-00-646-3311