2nd flat grove 90degrees to 1st
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 5930-01-631-1873
NSN 5935-01-246-2283
NSN 5925-01-438-2983
NSN 7035-01-542-7946
NSN 5915-01-505-1685
NSN 5975-00-926-7563
NSN 7035-01-094-2365
NSN 6685-01-512-2014
NSN 5965-01-566-8609
NSN 5855-01-041-3432
NSN 6620-00-234-3369
NSN 5910-01-146-5438