With 2 grooves and shallow slot in center
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 6320-01-064-0372
NSN 5920-01-026-9167
NSN 5895-00-155-4578
NSN 6105-00-840-6433
NSN 5915-01-192-3141
NSN 5935-01-588-4318
NSN 5996-00-890-5254
NSN 5905-00-313-6450
NSN 5835-01-572-9308
NSN 6220-01-094-1207
NSN 6620-01-432-7032
NSN 5950-00-100-6737