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 6240-00-370-5862
NSN 6220-01-477-4412
NSN 5996-01-648-7809
NSN 5996-01-545-7932
NSN 5975-01-613-3070
NSN 5935-01-504-3712
NSN 5998-00-369-1101
NSN 6240-01-367-3656
NSN 2925-01-264-5256
NSN 5920-01-594-6994
NSN 6620-00-938-8212
NSN 4140-00-575-6586