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 6610-01-555-8364
NSN 6320-01-592-6248
NSN 6145-00-115-1845
NSN 5996-01-519-3843
NSN 5975-01-211-9979
NSN 5999-01-331-7632
NSN 6240-01-079-6622
NSN 5910-00-485-0999
NSN 6645-01-572-4475
NSN 6145-00-646-8936
NSN 5855-01-069-4742
NSN 6610-01-257-5808