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 6150-01-157-5152
NSN 4140-01-420-6508
NSN 5999-00-242-1759
NSN 5996-01-551-5714
NSN 6110-01-086-1409
NSN 4140-01-460-0440
NSN 6145-00-478-0261
NSN 4140-01-480-8634
NSN 5855-00-482-9876
NSN 5835-01-138-8622
NSN 5985-01-439-1836
NSN 6130-01-631-4096