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 5855-01-062-5655
NSN 5990-01-348-2497
NSN 6320-01-125-3361
NSN 5999-00-924-0463
NSN 5915-00-810-0164
NSN 5920-01-115-1739
NSN 6645-00-540-8930
NSN 6645-01-584-0892
NSN 6105-00-627-4499
NSN 5930-01-619-3738
NSN 6645-00-825-5677
NSN 5999-00-248-6984