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 5920-01-192-7975
NSN 7035-01-589-7132
NSN 6650-01-183-0711
NSN 5960-01-622-0393
NSN 6150-00-949-9889
NSN 6150-01-544-2135
NSN 6620-01-525-5914
NSN 6685-01-083-5448
NSN 5960-01-526-3843
NSN 6110-01-183-3767
NSN 5935-00-181-4464
NSN 5915-00-020-9249