With 2 grooves and shallow slot in center
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 5925-01-367-4425
NSN 5998-01-079-7769
NSN 6240-00-221-0859
NSN 2925-00-972-8180
NSN 5985-00-918-3843
NSN 6240-01-282-0983
NSN 5855-01-519-7929
NSN 5835-01-384-3206
NSN 5999-01-560-9336
NSN 5910-01-600-2613
NSN 2925-01-408-9485
NSN 6240-01-596-3183