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 5835-01-482-1591
NSN 5999-00-254-1341
NSN 6220-01-192-3451
NSN 5998-01-646-1051
NSN 5895-01-101-0388
NSN 6220-00-163-1183
NSN 5910-00-453-0532
NSN 6105-01-399-0695
NSN 6320-01-323-7565
NSN 6620-01-444-4048
NSN 6220-01-462-1479
NSN 6145-01-029-4184