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 5935-00-927-8652
NSN 5895-01-614-6143
NSN 6145-01-211-6591
NSN 4140-01-438-3854
NSN 5990-00-611-1661
NSN 5960-00-279-3536
NSN 5998-01-423-8525
NSN 6150-00-666-3635
NSN 5920-01-072-6610
NSN 5965-00-412-4402
NSN 5996-01-446-8198
NSN 5960-01-384-4603