Generator Pulley w/ Keyway Fits Ford Massey Tractor Fits:Ford- 8N 1947 - 1952 using keyed generator pulley- Massey- TO20, TO30 - .670" shaft inside diameter 3-5/8" OD 9/16" belt width Replacement Numbers:Replaces PNs:Ford- 8N10130, 8N10130A,8N10130C- Massey- 1750509M1, 1912440- 0 All JJAgParts items have been hand selected by our team and are continuously monitored by a quality control department. Should a craftsmanship or fitment concern be identified, JJAgParts will be sure to work with our customers to stand behind our products. JJAgParts is an American owned and operated family business! Here at JJAgParts, we strive for customer satisfaction, if you are not satisfied with your order, please do not hesitate to contact us so we can help make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase.