Internaly splined
A shaft having two or more different diameters (greater than 0.031 inches (0.79 millimeter)) along its length. It must have one or more of the following conditions: a specified surface finish designation in the range 1 to 125 microinches (0.025 to 3.2 micrometers) arithmetical average (aa), machined peripheral flat(s), circular groove(s), keyway(s), splines, threads, or holes. The ends and/or shoulders may be machined to accommodate bearings, couplings, and the like. It is not designed for use in aligning by fitting into corresponding holes of another item. For items used to support rotating members see axle(1), shouldered. For items not having any of the above conditions see pin, shoulder, headless. Excludes shaft(1), straight; and axle(1), straight.
Classification: Transmission shafts and cranks, except camshafts and crankshafts
NSN 6135-00-947-0406
NSN 7035-01-408-6802
NSN 5920-01-047-2901
NSN 6220-00-477-5946
NSN 6130-00-269-8273
NSN 5905-01-231-2666
NSN 5895-00-244-1838
NSN 5925-01-274-7639
NSN 5985-01-361-7663
NSN 6110-01-050-1283
NSN 6685-01-443-3575
NSN 6320-01-648-5538