This is the stock (0°) dowel to locate the sprocket to the camshaft on the Ford 1600 Kent engine. Dowels are also available in 1 to 9° offset (Part No. 161-40-Size) to advance or retard cam timing.
If your sprocket has an oversize (0.437") hole, you will need a dowel plus our Cam Sprocket Dowel Button (Part No. 161-35-0), sold separately.