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 5935-01-654-4083
NSN 5998-01-264-8846
NSN 5930-01-447-6124
NSN 7035-01-538-7381
NSN 5895-01-455-2474
NSN 6135-00-262-6807
NSN 5905-01-314-9491
NSN 6105-01-112-2308
NSN 5835-01-009-2417
NSN 6650-01-172-0198
NSN 6220-00-567-6862
NSN 6620-01-476-4567