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 6620-01-130-5700
NSN 6620-01-453-6764
NSN 6240-00-126-4551
NSN 5960-00-857-6786
NSN 5950-00-610-3682
NSN 5915-00-636-9785
NSN 6105-01-180-5013
NSN 6135-01-332-0431
NSN 5985-01-186-2964
NSN 4140-01-331-0844
NSN 5930-01-158-5040
NSN 6685-01-197-0540