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 6645-00-183-8812
NSN 7035-00-946-2642
NSN 5965-00-917-0455
NSN 6105-01-309-2095
NSN 5960-00-688-7510
NSN 6620-01-127-0049
NSN 6240-01-372-1034
NSN 6145-01-542-6145
NSN 5945-01-420-7776
NSN 5935-00-232-7296
NSN 5905-00-161-5184
NSN 5975-00-293-8166