Crankshaft Pulley (For 5/8" wide belts) Fits Ford Tractor Fits:Ford- Jubilee, NAA both 1953- 1954- Specifications 6.150" O.D., 1.971" Center Hole I.D. Replacement Numbers: Ford- D7NN6A312A, EAF6312C- Note: For 5/8" wide belts. Single groove sheet metal. All JJAgParts items have been hand selected by our team and are continuously monitored for Quality. Should a craftsmanship or fitment concern be identified, JJAgParts will work with you 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 contact us so we can make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase.