Underwater life support iaw navsea instruction 10560.2b
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 4140-00-889-7990
NSN 5910-01-273-5451
NSN 5996-01-518-4674
NSN 2925-01-446-6523
NSN 5975-01-124-0353
NSN 6650-00-253-9195
NSN 6105-00-113-9364
NSN 6135-01-449-2144
NSN 6320-01-173-7950
NSN 6135-01-168-2944
NSN 6320-01-366-5157
NSN 6645-01-627-6629