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 6145-01-634-0388
NSN 6620-01-420-3386
NSN 5996-00-910-0255
NSN 5996-01-335-0584
NSN 6620-01-441-7896
NSN 5925-01-025-0322
NSN 5965-01-502-3030
NSN 6645-01-463-3024
NSN 5925-01-596-0292
NSN 5835-01-485-0210
NSN 5855-00-991-0096
NSN 6650-01-396-4826