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 5905-00-203-4480
NSN 6620-01-262-9489
NSN 5960-00-300-2358
NSN 5910-00-184-6718
NSN 5945-01-167-8498
NSN 5910-01-585-7104
NSN 6110-01-555-0946
NSN 2925-01-495-2690
NSN 6135-00-120-1034
NSN 5945-00-463-9969
NSN 6685-01-479-0421
NSN 5935-01-566-5502