First end has internal hexagon flatted hole
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 5930-00-953-0860
NSN 6150-01-463-3087
NSN 5990-00-229-4647
NSN 5930-01-163-8061
NSN 6220-01-528-7232
NSN 6650-00-135-7484
NSN 5999-01-439-7717
NSN 4140-00-126-4685
NSN 5950-00-964-2023
NSN 5945-01-108-1105
NSN 5935-00-004-6003
NSN 5835-01-558-9444