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 6610-00-578-6790
NSN 5985-01-185-7706
NSN 5990-01-414-7618
NSN 6135-01-582-5987
NSN 5920-01-441-0947
NSN 6645-00-914-2820
NSN 5855-01-515-5896
NSN 5910-01-436-1061
NSN 5910-00-197-0387
NSN 6650-01-202-9143
NSN 5945-00-145-9802
NSN 5965-01-204-8505