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 5910-00-204-8497
NSN 6220-00-905-1488
NSN 6130-00-528-1266
NSN 6320-00-149-7570
NSN 5990-01-554-8547
NSN 5920-01-245-3584
NSN 5975-00-727-6099
NSN 5945-01-507-2470
NSN 5930-01-608-7601
NSN 6650-01-603-3183
NSN 4140-01-287-5429
NSN 6610-00-912-6374