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 5935-01-107-1190
NSN 5965-01-352-0961
NSN 6145-01-492-4554
NSN 6610-01-514-8898
NSN 6645-01-195-0561
NSN 5905-00-405-7841
NSN 5905-01-076-5665
NSN 6685-01-104-3083
NSN 6150-00-246-6673
NSN 6105-01-634-0322
NSN 6645-00-704-3630
NSN 6135-00-998-5884