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 6650-01-430-7130
NSN 5930-01-195-0764
NSN 5999-01-053-8714
NSN 5960-01-114-0197
NSN 5985-01-327-2816
NSN 5975-01-010-0460
NSN 6150-01-352-5569
NSN 2925-01-306-4228
NSN 5855-01-364-1005
NSN 5960-00-565-0101
NSN 5999-00-229-8840
NSN 6610-01-336-2787