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 6685-00-923-8631
NSN 5965-00-678-5305
NSN 5975-00-690-9061
NSN 6685-01-201-6879
NSN 5855-01-388-6837
NSN 6220-01-414-0623
NSN 5965-00-906-8281
NSN 6220-01-353-0835
NSN 5835-01-485-0210
NSN 5950-00-679-9539
NSN 6130-00-395-7220
NSN 5930-00-087-4129