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 5920-01-028-2216
NSN 6145-01-545-1968
NSN 5855-01-419-5285
NSN 6645-01-631-6074
NSN 5835-01-446-6065
NSN 6105-00-414-8539
NSN 5996-01-072-1331
NSN 5985-01-068-5809
NSN 5985-01-521-1775
NSN 6650-01-188-8028
NSN 5990-00-276-8650
NSN 5855-00-494-9581