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 6135-01-513-3581
NSN 6685-01-324-0341
NSN 7035-01-423-8343
NSN 6150-01-243-7882
NSN 6610-01-326-0119
NSN 6110-00-876-0364
NSN 6150-01-544-7312
NSN 6220-00-081-6429
NSN 6645-01-437-9017
NSN 6105-01-305-2734
NSN 5835-00-958-6231
NSN 6645-01-627-8040