See drawing for further details
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 5855-01-250-2421
NSN 5960-00-127-5594
NSN 5930-01-579-0373
NSN 4140-01-400-3610
NSN 5855-01-495-1339
NSN 5960-00-315-0358
NSN 5960-00-654-3374
NSN 6610-01-538-4660
NSN 5960-01-640-9971
NSN 5998-01-330-5893
NSN 6145-01-555-7113
NSN 5855-01-646-1589