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 5920-00-236-1118
NSN 4140-01-279-0058
NSN 6320-00-646-3311
NSN 6240-01-101-7362
NSN 6610-00-811-6072
NSN 5996-00-336-3046
NSN 6130-01-386-5070
NSN 5999-01-502-8775
NSN 7035-01-605-6368
NSN 6685-00-799-6462
NSN 5985-01-634-0635
NSN 5835-01-632-6627