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 6110-01-589-5005
NSN 6135-01-333-6737
NSN 5910-01-250-1168
NSN 5999-01-247-1367
NSN 5855-01-201-4857
NSN 5855-01-441-1392
NSN 5935-00-534-4773
NSN 4140-00-534-0523
NSN 5985-01-075-9561
NSN 5895-00-826-7977
NSN 5925-00-589-1912
NSN 5935-00-668-7903