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 6645-00-358-7379
NSN 5996-01-101-0298
NSN 6130-01-275-3843
NSN 5996-01-131-7809
NSN 6645-01-232-4843
NSN 5998-00-508-1863
NSN 5930-01-192-3232
NSN 6130-01-515-6369
NSN 2925-00-446-6453
NSN 6620-01-481-1358
NSN 6135-01-222-0703
NSN 6110-01-200-2694