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 2925-01-446-6966
NSN 5985-01-472-6637
NSN 6145-01-119-2116
NSN 6145-01-392-0910
NSN 5996-01-413-7533
NSN 5965-00-568-5802
NSN 6645-00-321-6071
NSN 5990-00-027-7508
NSN 6685-01-522-2466
NSN 5910-01-237-0066
NSN 5855-00-896-4047
NSN 5960-01-424-0590