2 flats 90 degrees apart at ea location and visually coplanar; shaft straight within 0.001 in 6 in.
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 7035-01-432-2424
NSN 6240-01-543-7055
NSN 5910-01-531-3672
NSN 6620-01-116-3983
NSN 5996-01-141-6916
NSN 5965-00-529-0602
NSN 6130-01-462-2048
NSN 5925-00-463-4006
NSN 6130-01-519-8026
NSN 6650-00-272-2271
NSN 6610-01-579-2984
NSN 4140-01-184-5191