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 5945-01-422-1255
NSN 5910-01-406-3505
NSN 5998-00-162-9243
NSN 6645-01-633-1852
NSN 6110-01-255-9892
NSN 7035-01-463-9855
NSN 6610-01-083-1446
NSN 6220-00-165-7095
NSN 5920-00-233-7366
NSN 6150-00-575-8961
NSN 5895-01-044-4987
NSN 6650-00-316-4889