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 5950-00-131-2406
NSN 6240-01-235-2604
NSN 4140-00-810-9330
NSN 5985-01-012-0948
NSN 6645-01-068-3042
NSN 4140-00-987-2925
NSN 5915-01-237-2480
NSN 5855-01-213-3267
NSN 6620-01-571-7727
NSN 6105-01-655-2299
NSN 5930-00-433-2034
NSN 5855-01-258-6180