No.2=56 unc-2b x .20 dp both end
No other part numbers with same form, fit, and function found.
A straight shaft having two or more of the following conditions: a specified surface finish designation in the range of 1 to 125 microinches (o.O25 to 3.2 micrometers), arithmetical average (aa), machined peripheral flat(s), circular groove (s), keyway(s), splines, threads, or holes. It is not designed for use in aligning by fitting into corresponding holes of another item. It may be drilled for lubricating holes. For items having an integral gear(s) or worm(s), see gearshaft (as modified). For items designed to support rotating members see axle(1), straight. For items not having the above conditions see pin, straight, headless. For items having machined ends which constitute steps see shaft(1), shouldered; axle(1), shouldered; and bolt, fluid passage.
Classification: Transmission shafts and cranks, except camshafts and crankshafts
NSN 5935-01-542-5591
NSN 5935-00-276-9413
NSN 5945-01-425-2320
NSN 6685-00-186-9190
NSN 5990-00-583-9458
NSN 6620-01-313-8164
NSN 5985-00-237-2403
NSN 5960-01-023-1178
NSN 5835-01-463-2334
NSN 5835-01-158-6878
NSN 6685-01-246-1912
NSN 6320-00-456-0836