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 6620-01-400-2928
NSN 5950-01-535-1607
NSN 5895-01-273-1990
NSN 5895-01-634-0630
NSN 5910-00-417-8776
NSN 6150-01-624-2656
NSN 5835-00-532-5910
NSN 2925-00-386-1127
NSN 5999-00-349-7432
NSN 5935-00-661-0825
NSN 5835-01-514-5758
NSN 5930-01-384-5488