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 6650-01-272-3727
NSN 6130-01-004-6505
NSN 6130-00-156-3871
NSN 6145-01-032-6116
NSN 5999-01-252-7105
NSN 6645-01-199-0062
NSN 5855-01-559-9639
NSN 6220-01-337-2933
NSN 5950-01-161-2044
NSN 5930-01-190-1310
NSN 5985-01-654-1028
NSN 5999-01-155-9720