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 6150-01-055-5424
NSN 6240-01-537-1832
NSN 5895-01-310-3526
NSN 5905-01-285-3894
NSN 5990-00-419-0236
NSN 6320-01-006-6138
NSN 6130-01-470-5165
NSN 5935-01-075-3301
NSN 6145-01-188-2789
NSN 6650-01-068-3687
NSN 6220-01-191-7643
NSN 5945-00-929-5230