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 5950-01-056-5157
NSN 5935-00-400-5821
NSN 5996-00-890-5254
NSN 5960-01-495-0859
NSN 5985-01-204-8432
NSN 5925-01-661-2591
NSN 6610-00-207-4207
NSN 6320-01-085-8845
NSN 5930-01-408-2952
NSN 5935-01-643-5042
NSN 6130-00-246-5638
NSN 5975-01-332-6909