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 2925-01-411-4666
NSN 5998-01-475-0269
NSN 6145-01-327-3328
NSN 6620-01-601-4314
NSN 6145-00-782-4420
NSN 5960-01-207-9544
NSN 6240-01-338-1773
NSN 5920-01-129-4970
NSN 7035-01-019-5729
NSN 5985-01-164-0550
NSN 5895-00-408-5044
NSN 6220-01-183-7279