Threads are 3/8-16unc-2a
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 6645-01-057-5436
NSN 6150-01-428-7256
NSN 6650-00-614-1711
NSN 5930-01-217-0514
NSN 5945-01-524-7896
NSN 6320-00-382-7825
NSN 5920-01-333-2376
NSN 6110-01-056-4964
NSN 5960-00-237-6917
NSN 7035-01-114-8550
NSN 5999-01-486-7731
NSN 5895-00-651-7463