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 6645-01-022-2632
NSN 6240-01-541-9715
NSN 5999-01-418-8503
NSN 5960-01-632-6576
NSN 6130-01-025-3378
NSN 6650-00-678-5627
NSN 6145-01-487-6936
NSN 6220-01-550-8240
NSN 5945-01-395-7623
NSN 6130-00-834-0142
NSN 6685-00-947-4066
NSN 6240-00-072-9966