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 6110-01-053-1755
NSN 5835-01-471-2861
NSN 5950-00-896-3537
NSN 5895-01-127-3592
NSN 2925-00-420-5566
NSN 6130-01-317-7529
NSN 5910-00-811-8345
NSN 5935-01-444-1286
NSN 6650-01-191-5851
NSN 5998-00-950-0565
NSN 6650-00-455-9457
NSN 6135-01-116-3385