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 6685-01-058-4437
NSN 5960-00-493-5589
NSN 6240-00-822-4571
NSN 5920-01-246-5678
NSN 6110-00-077-2353
NSN 5835-01-478-9428
NSN 5998-00-875-6321
NSN 5855-01-051-1155
NSN 4140-01-423-1647
NSN 4140-01-254-3689
NSN 5855-01-564-0112
NSN 5965-00-627-8382