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 5920-01-343-2769
NSN 6645-01-053-3185
NSN 5975-00-153-7971
NSN 5905-00-727-5583
NSN 5999-01-437-8834
NSN 5895-00-682-5739
NSN 6645-00-421-5287
NSN 5960-00-204-7506
NSN 6130-01-634-0603
NSN 4140-01-184-7417
NSN 5975-01-121-9184
NSN 5920-01-446-1123