At OMB Warehouse, we strive to provide the greatest selection and quality of parts for your outdoor power equipment.Need other parts to complete your project? Check out our huge catalog - we have what you need.9 Tooth, 5/8" Bore, C Sprocket for 40/41/420 Chain 9 with Keystock for torque converters and jackshafts. C Type sprockets have a hub on both sides. Key is 3/16" wide.