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 5990-01-259-7138
NSN 6220-01-508-6595
NSN 2925-01-063-7876
NSN 5935-01-025-9703
NSN 6650-00-231-7843
NSN 5998-00-018-0805
NSN 5975-00-111-1226
NSN 6620-01-578-6562
NSN 5835-00-698-9824
NSN 6135-01-071-4923
NSN 5935-00-350-6146
NSN 6105-01-320-1138