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 5895-01-083-3629
NSN 5990-00-616-4289
NSN 5975-01-620-3319
NSN 5920-01-145-4979
NSN 5915-00-548-7116
NSN 6110-01-227-2617
NSN 5990-00-683-1095
NSN 5945-00-717-3667
NSN 5999-01-228-4889
NSN 5960-01-489-1510
NSN 6135-00-078-9931
NSN 5975-01-026-9931