0.631" hole diameter 1.200" outside diameter 0.032" material thickness external key bent 90 degrees with a 0.046 inch dia hole, washer has an internal straight key anodize surface treated key
3.008" hole diameter 4.365" outside diameter 0.210" material thickness punch 14 equally spaced holes 0.328 inch diameter center line of first hole must be 6 degrees to the left of internal key centerline on 3.750 inch bolt hole circle key