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 5945-01-004-2399
NSN 5920-01-299-6479
NSN 5930-01-491-4327
NSN 4140-00-246-4969
NSN 6685-00-116-8073
NSN 7035-01-581-5527
NSN 6105-01-427-2336
NSN 5935-00-959-6853
NSN 6320-01-295-9992
NSN 5998-01-423-8248
NSN 5905-00-867-8846
NSN 5960-01-185-4216