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 5999-01-227-8399
NSN 7035-01-568-0144
NSN 5998-00-903-7901
NSN 6220-00-536-3255
NSN 6105-00-185-1579
NSN 6105-01-246-5024
NSN 6685-01-538-9986
NSN 6145-00-727-1770
NSN 5950-01-411-6227
NSN 5960-00-909-7009
NSN 5998-01-171-6454
NSN 5998-00-937-3541