Part # 255-2942 provides a replacement hub for the flexible coupling that mounts to the flywheel about the hydraulic pump shaft to reduce engine load vibration.Attributes:• Steel coupling hub• Internal Spline Number of Teeth: 14• Outside Diameter: 100 mm (3.94 in)• Inside Diameter: 31.75 mm (1.25 in)• Width: 52 mm (2.05 in)• Thread: M16x2 (6X)Application:Consult your owner's manual or contact your local Cat Dealer for more information.