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 4140-01-039-0414
NSN 5965-01-132-4018
NSN 5985-01-352-8645
NSN 5920-01-597-2024
NSN 6150-00-959-6164
NSN 5960-01-014-1595
NSN 5990-01-455-2919
NSN 5855-01-327-2681
NSN 5905-01-634-0595
NSN 5930-01-055-9635
NSN 6130-01-626-6540
NSN 6645-01-372-8892