A tube coupling nut with the shank end accommodating a smaller tube size than is accommodated by the tube fitting which connects to the threaded end.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6685-00-296-0392
NSN 5990-01-400-3299
NSN 6320-01-504-3948
NSN 5950-01-438-8073
NSN 5905-00-281-5442
NSN 6150-01-409-2858
NSN 5920-01-563-3884
NSN 6145-01-406-6602
NSN 6685-00-075-0669
NSN 6620-01-371-5040
NSN 5915-01-196-4787
NSN 5999-01-143-2122