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 5975-01-337-2961
NSN 5975-00-800-0287
NSN 6145-01-365-3709
NSN 4140-00-390-5822
NSN 5965-01-649-1279
NSN 5855-01-013-6864
NSN 7035-01-603-0919
NSN 5965-01-476-0721
NSN 6135-01-388-2761
NSN 4140-01-127-0032
NSN 6220-01-406-5351
NSN 5935-01-560-8212