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 5915-01-279-5875
NSN 5999-01-250-4220
NSN 6240-01-633-9357
NSN 6620-01-323-6091
NSN 6145-00-450-6483
NSN 6320-00-403-6003
NSN 5945-01-277-8649
NSN 6105-00-456-0920
NSN 5835-00-823-6116
NSN 6610-01-083-1446
NSN 5910-00-843-1887
NSN 6320-01-111-8851