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 5998-00-952-2979
NSN 6645-01-420-0229
NSN 6145-01-434-1843
NSN 5945-00-948-3673
NSN 6105-01-385-0502
NSN 5965-00-172-5103
NSN 6610-01-310-3313
NSN 6130-01-233-7885
NSN 5945-01-392-1068
NSN 2925-01-214-5333
NSN 5999-01-004-9905
NSN 6135-01-231-4809