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5/8"-18 thread. A=2-7/8" B=7/8" C=1-3/16" D=13/16". (ea)
A=2-7/8" B=7/8" C=1-3/16" D=13/16". The drive studs are 5/8"-18 thread and are held into the axle flange with jams nuts. Sold each.