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 5910-01-305-6440
NSN 5945-01-018-4941
NSN 6610-00-073-2685
NSN 5895-00-437-5955
NSN 6145-01-493-6364
NSN 5905-01-648-4230
NSN 5996-01-497-3412
NSN 6610-01-368-0465
NSN 6320-01-352-5653
NSN 6110-01-220-7168
NSN 6685-01-069-3639
NSN 5998-01-431-0971