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 5930-01-340-9775
NSN 5999-01-348-8871
NSN 2925-00-406-4381
NSN 5950-00-056-0131
NSN 6645-01-471-4960
NSN 6650-00-834-9062
NSN 4140-00-980-0467
NSN 6620-01-587-5972
NSN 5998-01-386-4682
NSN 4140-01-605-1533
NSN 6110-00-858-6770
NSN 5935-01-198-1906