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 6150-00-232-6568
NSN 5985-00-126-6575
NSN 5965-01-415-2898
NSN 5990-01-465-3088
NSN 5910-01-153-0661
NSN 5855-00-256-5562
NSN 5965-00-827-9680
NSN 6145-01-279-1264
NSN 5835-00-339-3020
NSN 4140-01-478-2409
NSN 5990-01-003-2627
NSN 5960-01-599-9821