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 5895-01-551-7838
NSN 5996-00-231-9322
NSN 2925-00-772-5611
NSN 5965-01-650-6481
NSN 7035-00-020-2227
NSN 5965-00-653-4782
NSN 6650-00-098-6128
NSN 6650-01-289-3901
NSN 5935-01-250-8508
NSN 6150-01-100-4337
NSN 5935-01-281-7345
NSN 6135-00-485-7402