Second step has one woodruff keyway 0.148 in. W 0.160 in. Deep; largest diameter is flatted 0.630 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 6240-00-727-0919
NSN 6320-01-157-4400
NSN 6645-01-137-7974
NSN 6620-01-600-0479
NSN 6620-01-392-7191
NSN 6220-01-517-2365
NSN 6620-01-519-2628
NSN 6685-01-139-4755
NSN 5910-01-620-3237
NSN 5998-01-113-3564
NSN 5975-00-484-9339
NSN 5905-01-483-8663