Two more grooves same size of end ones and one woodruff key
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 6685-01-569-7682
NSN 6320-01-312-3620
NSN 4140-01-199-4589
NSN 5930-01-449-5970
NSN 5965-01-607-5753
NSN 5996-01-156-9688
NSN 5895-01-232-7367
NSN 5960-00-328-4058
NSN 5960-00-480-3490
NSN 6320-01-224-0063
NSN 6105-01-410-7634
NSN 5965-01-089-7678