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 5930-00-914-3079
NSN 6110-00-493-7435
NSN 5999-00-347-3949
NSN 5930-00-721-0421
NSN 6610-01-600-5789
NSN 4140-00-375-6021
NSN 5965-01-086-0081
NSN 5996-01-185-6605
NSN 6620-00-254-8985
NSN 5895-00-421-6171
NSN 6610-01-197-8302
NSN 6220-01-044-5552