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 7035-01-508-0619
NSN 5935-01-099-1662
NSN 5835-01-010-3103
NSN 6645-00-960-6594
NSN 6240-01-476-7357
NSN 6135-01-046-6803
NSN 6105-01-533-5232
NSN 6150-01-312-4470
NSN 6320-01-308-9392
NSN 6150-00-153-9361
NSN 5960-01-484-2042
NSN 6220-00-617-9616