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 5920-01-050-7474
NSN 5835-00-034-4976
NSN 6135-01-388-7210
NSN 7035-01-629-5792
NSN 5996-01-442-4136
NSN 5915-01-238-6421
NSN 5905-01-254-2741
NSN 7035-01-566-3784
NSN 6645-00-533-8037
NSN 5855-01-506-6767
NSN 5945-01-462-1555
NSN 2925-01-233-8545