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 7035-00-117-0418
NSN 5915-00-344-7480
NSN 6240-01-255-9978
NSN 6110-00-247-0211
NSN 6150-00-153-3196
NSN 6220-01-388-2624
NSN 2925-00-137-5120
NSN 6320-01-198-4024
NSN 6685-00-287-7564
NSN 5895-00-539-8322
NSN 5975-01-386-6570
NSN 6130-01-147-0693