Fine Thread Drive Shaft

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Used in upper crank assemblies, and the lower left hand chain drive system found on certain 12 foot box units. The crank assembly gears and mechanism ride on this drive shaft. The drive hub extension tube threads onto the second set of threads of this shaft. Video available Dimensions are 3 3/4" long and 5/8" diameter at it's widest point. The rear pin hole for the toothed sprocket sits at 7/8 of an inch as measured from the rear to the center of the hole. Here are examples of drive shafts with damaged threads. Fine thread nuts for this drive shaft are available Part number 4751A3521 Show more