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 6650-01-378-1530
NSN 5915-00-367-2854
NSN 5920-01-029-3813
NSN 6105-00-086-7815
NSN 5855-01-252-5424
NSN 5950-01-075-9046
NSN 6220-01-032-7370
NSN 5905-01-363-9891
NSN 6620-00-555-3992
NSN 5915-01-468-5465
NSN 5915-01-477-9756
NSN 4140-01-070-4928