Motor sprocket nut

Dec 12, 2015
43
6
8
Illinois
I've looked at a lot of sites that sell gas motor parts and it seems no one sells the nut that holds the motor sprocket on the clutch shaft. I'd probably be better off buying a good nut and using my grinder, grind it to the same thickness of the stock nut. My stock nut is stripped, and no, I'm not thinking I'm Hercules when I tighten it, I've had it off countless times for various reasons, most often splitting the cases. Does anyone know the thread size of this sprocket nut?