Part # 630-9021 provides a stop pin for the retarder control valve of the torque converter.Attributes:• Material: Steel• Pin Diameter: 13.89 mm (0.546 in)• Overall Length: 73.85 mm (2.907 in)• Head Diameter: 18.42 mm (0.725 in)• Head Height: 3.18 mm (0.125 in)Application:Consult your owner’s manual or contact your local Cat Dealer for more information.