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 5855-00-138-2386
NSN 4140-01-304-7563
NSN 6105-01-253-5287
NSN 6105-01-525-8112
NSN 6240-01-371-3020
NSN 6130-01-425-3673
NSN 5910-01-381-3009
NSN 5895-00-190-5709
NSN 5990-01-365-6016
NSN 5905-01-485-1228
NSN 6650-01-441-6578
NSN 5998-00-483-5159