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 5975-01-137-5673
NSN 7035-01-516-5461
NSN 5996-00-902-3445
NSN 5999-00-957-6548
NSN 5835-01-468-6170
NSN 6110-01-138-7447
NSN 5990-00-108-5400
NSN 7035-01-145-5059
NSN 6610-01-533-7458
NSN 7035-01-474-6886
NSN 6145-00-556-8850
NSN 5895-01-648-6584