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