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 6320-01-227-2648
NSN 6135-01-210-8715
NSN 6610-00-840-6187
NSN 5975-00-051-7337
NSN 5935-01-189-9674
NSN 6320-00-468-8421
NSN 5965-01-241-9865
NSN 5975-01-605-1999
NSN 6145-00-436-3425
NSN 6110-01-359-2743
NSN 4140-01-278-2105
NSN 5945-01-351-7869