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 2925-01-633-4048
NSN 5998-00-199-0527
NSN 6240-00-155-5817
NSN 5965-01-058-1414
NSN 5905-01-370-3397
NSN 5910-01-432-9321
NSN 6645-01-284-6533
NSN 5935-00-044-9490
NSN 6145-01-308-0196
NSN 6645-01-400-2119
NSN 5910-01-179-8525
NSN 5975-01-069-3236