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 6150-00-997-5861
NSN 5960-01-632-6576
NSN 5920-01-562-4779
NSN 5895-01-577-9050
NSN 5905-00-375-0011
NSN 4140-00-147-5864
NSN 5935-01-508-3935
NSN 6685-00-427-7587
NSN 5950-00-451-1384
NSN 5905-01-028-6999
NSN 5905-00-521-9750
NSN 6105-01-386-7010