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 5996-00-456-1903
NSN 5905-01-374-1642
NSN 5965-01-189-4805
NSN 6135-01-217-8810
NSN 4140-01-060-1438
NSN 5996-01-333-1616
NSN 5835-01-519-2916
NSN 5945-00-820-9792
NSN 6145-01-626-0319
NSN 5925-01-491-0509
NSN 6130-01-294-6507
NSN 5930-00-073-6613