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 5920-01-294-2805
NSN 5920-01-206-3961
NSN 4140-01-535-2691
NSN 5945-00-594-5168
NSN 5985-01-423-0581
NSN 5996-01-456-4524
NSN 5920-01-521-3087
NSN 6105-01-342-2506
NSN 5920-01-492-4462
NSN 6620-01-544-1083
NSN 7035-01-348-5153
NSN 5910-01-457-6012