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 6145-00-366-5790
NSN 4140-01-245-8866
NSN 6145-01-268-6992
NSN 6620-01-361-6460
NSN 5950-01-071-0302
NSN 6220-00-181-2388
NSN 5835-00-807-5632
NSN 5965-00-156-8562
NSN 5935-01-303-8653
NSN 6105-01-222-2592
NSN 6130-01-582-9697
NSN 4140-01-057-0968