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 5960-01-334-5146
NSN 6130-00-257-8038
NSN 5960-00-188-8648
NSN 6220-01-463-8673
NSN 6620-01-250-1692
NSN 5990-00-212-4316
NSN 5920-01-528-6293
NSN 6135-01-056-4609
NSN 5945-01-481-3701
NSN 5950-01-634-0677
NSN 6105-01-495-7548
NSN 5905-01-397-9853