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 6240-01-613-5801
NSN 6650-00-864-2942
NSN 6240-00-070-3659
NSN 5910-00-985-5160
NSN 5895-01-230-2557
NSN 5990-01-181-4143
NSN 6645-01-597-8106
NSN 6110-01-258-4300
NSN 6240-00-539-9770
NSN 6620-01-176-6956
NSN 6150-01-412-1123
NSN 2925-01-593-2542