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 6620-01-106-3553
NSN 6685-00-809-7599
NSN 5996-00-288-1829
NSN 5935-01-441-9434
NSN 6320-01-362-4863
NSN 6620-01-308-5723
NSN 5990-01-632-0969
NSN 7035-00-163-6221
NSN 5855-01-264-8599
NSN 5835-01-013-3420
NSN 5975-00-269-8391
NSN 6220-01-306-5610