Two flats on 2nd end 180 deg
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 6240-01-472-9197
NSN 6130-00-985-5345
NSN 7035-01-332-9582
NSN 5965-00-840-8849
NSN 5855-01-197-2774
NSN 6240-01-224-7656
NSN 6220-01-355-4955
NSN 5985-01-250-7808
NSN 5945-01-560-5150
NSN 6105-00-606-3234
NSN 5915-01-032-8331
NSN 5996-01-150-0759