Largest step hex 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 6240-00-503-6632
NSN 5950-01-320-9978
NSN 5925-00-529-3950
NSN 5915-00-903-0872
NSN 6110-01-462-1698
NSN 6645-01-180-6219
NSN 6650-01-413-3825
NSN 4140-01-587-5770
NSN 5965-01-628-4562
NSN 5905-01-091-9131
NSN 5990-00-202-5127
NSN 4140-00-810-1973