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 6145-00-185-9962
NSN 6610-01-520-5124
NSN 6650-00-299-9681
NSN 6620-01-446-6571
NSN 5975-01-272-8779
NSN 5910-01-418-7621
NSN 5950-01-362-0996
NSN 5965-00-021-5620
NSN 5975-01-027-6657
NSN 5945-01-408-9858
NSN 5996-00-168-8828
NSN 5985-01-228-4879