8 circular grooves
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 6645-00-497-3495
NSN 6135-01-110-3516
NSN 5965-01-142-1807
NSN 6650-00-925-1274
NSN 5960-00-521-0221
NSN 5990-00-795-3796
NSN 6135-01-514-5358
NSN 5925-01-574-2048
NSN 5985-01-427-3734
NSN 7035-01-287-9817
NSN 5975-01-389-7279
NSN 5945-00-924-8108