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 5915-00-020-9249
NSN 5915-01-177-5060
NSN 6610-00-388-9188
NSN 5960-01-093-1919
NSN 5925-01-205-7482
NSN 6150-00-456-1724
NSN 6105-01-155-3139
NSN 6105-01-411-3996
NSN 5975-01-023-1977
NSN 5999-00-521-9747
NSN 6145-01-239-6988
NSN 4140-01-529-8176