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 6135-01-177-3552
NSN 5990-00-467-7431
NSN 5999-01-260-3396
NSN 7035-01-317-4227
NSN 5985-01-231-3152
NSN 5999-01-119-1532
NSN 5915-01-302-8985
NSN 6150-01-215-5692
NSN 6135-01-553-3604
NSN 6145-00-818-0801
NSN 5990-00-221-0878
NSN 6645-01-436-9702