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 5950-01-171-5750
NSN 6320-00-583-3104
NSN 6110-01-514-2346
NSN 4140-00-247-4773
NSN 6130-01-075-5945
NSN 5950-01-303-8706
NSN 5999-01-339-3683
NSN 5999-00-567-4038
NSN 5910-00-926-0111
NSN 5920-01-576-0181
NSN 4140-01-225-0041
NSN 6240-01-569-2012