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: 20• Hub Width: 41.28 mm (1.625 in)• Internal diameter with keyway • External Pitch Diameter: 162.36 mm (6.392 in)• Thread Size: 5/16-18Application:Consult your owner's manual or contact your local Cat Dealer for more information.