1/2-13 tapx1.0 deep w/center both ends
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 6130-01-040-9808
NSN 4140-01-143-5397
NSN 5945-01-429-4029
NSN 5930-01-467-9140
NSN 6685-01-482-1328
NSN 5905-01-423-0589
NSN 5950-00-253-8997
NSN 5975-01-391-1113
NSN 5905-01-518-3398
NSN 5835-01-529-3050
NSN 5895-01-194-7650
NSN 6130-00-277-4402