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 5895-01-239-6234
NSN 6645-00-991-8704
NSN 6135-00-321-6707
NSN 4140-01-456-7156
NSN 5905-01-367-1710
NSN 5915-01-318-6336
NSN 5835-01-416-6449
NSN 6610-01-075-5821
NSN 5990-00-067-6791
NSN 2925-01-106-3552
NSN 6685-01-195-2129
NSN 6135-00-958-7981