Largest step is hex-shaped, 0.500 in.Across flats
A shaft having two or more different diameters (greater than 0.031 inches (0.79 millimeter)) along its length. It must have one or more of the following conditions: a specified surface finish designation in the range 1 to 125 microinches (0.025 to 3.2 micrometers) arithmetical average (aa), machined peripheral flat(s), circular groove(s), keyway(s), splines, threads, or holes. The ends and/or shoulders may be machined to accommodate bearings, couplings, and the like. It is not designed for use in aligning by fitting into corresponding holes of another item. For items used to support rotating members see axle(1), shouldered. For items not having any of the above conditions see pin, shoulder, headless. Excludes shaft(1), straight; and axle(1), straight.
Classification: Transmission shafts and cranks, except camshafts and crankshafts
NSN 6105-01-483-1506
NSN 6105-01-200-8131
NSN 5835-00-794-7500
NSN 6135-01-572-3296
NSN 6620-01-446-6571
NSN 5935-01-413-1625
NSN 6110-00-450-0194
NSN 6110-01-633-9660
NSN 6650-00-597-7313
NSN 5965-00-583-4865
NSN 5930-01-107-7126
NSN 5985-01-013-4600