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 4140-00-101-7903
NSN 5910-00-994-3571
NSN 6130-01-208-0180
NSN 4140-01-054-0289
NSN 5835-01-071-1689
NSN 5985-01-579-8170
NSN 4140-01-474-5007
NSN 5996-00-224-3526
NSN 6105-01-136-5978
NSN 6110-01-616-2492
NSN 5925-01-461-9298
NSN 6135-00-269-5843