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 5985-01-319-8027
NSN 5950-01-603-8138
NSN 6145-00-615-2019
NSN 5935-01-544-9051
NSN 5960-01-278-9394
NSN 5960-00-686-8603
NSN 6645-00-025-4771
NSN 5960-01-464-9605
NSN 5920-00-826-0949
NSN 5920-00-964-9986
NSN 5960-01-573-6483
NSN 6145-00-161-4629