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 5950-01-237-5773
NSN 6145-01-634-0388
NSN 6240-00-754-8392
NSN 4140-01-090-2926
NSN 6145-00-409-6844
NSN 2925-01-394-9658
NSN 6110-01-363-6649
NSN 7035-00-188-6674
NSN 2925-01-415-2140
NSN 6145-01-594-2177
NSN 5990-01-263-9364
NSN 6105-01-020-8187