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 6645-00-466-0685
NSN 5990-01-044-4767
NSN 5905-01-634-0595
NSN 6110-00-099-7113
NSN 5910-01-050-8451
NSN 5895-01-424-7799
NSN 5935-00-232-0354
NSN 5910-01-329-1725
NSN 5855-01-236-9645
NSN 5990-01-591-0701
NSN 6685-01-044-9505
NSN 5945-01-170-6666