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 2925-01-444-2061
NSN 5996-01-426-1920
NSN 5895-00-521-3046
NSN 6150-01-646-3895
NSN 6130-00-528-7838
NSN 5935-00-192-7163
NSN 6220-01-055-6555
NSN 5935-00-104-7528
NSN 5998-01-452-0035
NSN 6220-00-299-6721
NSN 5905-00-082-1927
NSN 5960-01-585-6385