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 5915-00-484-9487
NSN 5998-00-453-2397
NSN 5996-00-896-7086
NSN 5915-01-578-6153
NSN 5998-01-592-5408
NSN 5920-00-083-8621
NSN 5990-01-541-5632
NSN 5915-00-773-2333
NSN 6650-01-399-8552
NSN 7035-00-973-9215
NSN 5960-01-530-8828
NSN 5945-01-435-3470