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 6220-01-471-6219
NSN 5915-00-197-8610
NSN 6320-01-233-5798
NSN 5905-00-499-7787
NSN 6130-01-165-4616
NSN 5999-01-399-7254
NSN 6150-01-571-8906
NSN 6220-01-364-1675
NSN 5985-00-847-1744
NSN 6150-01-418-0134
NSN 5835-00-943-2763
NSN 6135-01-430-3119