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 5960-01-523-9098
NSN 4140-00-712-8285
NSN 6320-00-004-9158
NSN 5950-01-073-3729
NSN 6135-01-610-2098
NSN 5960-01-609-6565
NSN 5996-01-317-9389
NSN 6240-01-103-1198
NSN 5945-00-903-6965
NSN 5950-00-841-5119
NSN 5996-01-215-2769
NSN 5925-01-300-7491