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 5905-00-275-5443
NSN 5975-01-381-6665
NSN 6645-01-510-3496
NSN 5895-00-118-1895
NSN 6110-01-204-3145
NSN 5975-00-428-1683
NSN 5996-01-098-2822
NSN 6620-01-175-5922
NSN 6135-00-087-5300
NSN 6240-01-462-4812
NSN 5855-00-548-4742
NSN 6105-01-077-4273