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 5985-01-359-0761
NSN 5990-01-055-1523
NSN 6145-00-058-8564
NSN 5930-00-151-9286
NSN 7035-00-626-1958
NSN 6610-01-605-2451
NSN 6610-01-556-2353
NSN 5930-00-116-6159
NSN 5996-00-003-7957
NSN 5950-01-303-6994
NSN 5990-01-218-8976
NSN 5998-01-439-9108