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 5915-00-776-6496
NSN 5935-01-100-3661
NSN 6240-01-142-2963
NSN 6110-01-338-9957
NSN 6135-01-332-0431
NSN 5855-00-228-8446
NSN 5999-01-598-4202
NSN 5920-01-339-7421
NSN 6130-01-257-2721
NSN 5945-00-439-6199
NSN 7035-01-258-7661
NSN 6240-00-233-3481