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 7035-01-556-9183
NSN 6645-00-321-6071
NSN 5935-01-122-2200
NSN 5915-01-406-1515
NSN 4140-01-467-9977
NSN 6240-01-213-4905
NSN 6145-01-558-9396
NSN 5965-00-892-0972
NSN 6650-00-537-9222
NSN 6150-00-226-9978
NSN 4140-01-468-7618
NSN 5905-00-118-1040