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 5930-01-168-4124
NSN 5998-01-290-8646
NSN 2925-00-989-0523
NSN 6220-01-420-5986
NSN 5996-00-118-7426
NSN 6105-00-664-1292
NSN 5965-00-161-3954
NSN 7035-00-300-3208
NSN 6650-01-526-5024
NSN 6145-00-570-0516
NSN 5960-01-271-8107
NSN 6145-01-407-0169