Description: Sprocket transfers engine power to the link assemblies and engage the link assembly to create motion.Attributes:• Steel sprocket with set screws• Hardened• Sprocket Teeth: 13• Hub Width: 38.1 mm (1.5 in)• Internal diameter with keyway • External Pitch Diameter: 106.15 mm (4.179 in)• Thread Size: 5/16-18 (2X)Application:Consult your owner's manual or contact your local Cat Dealer for more information.