The Caterpillar Actuator Spacer AS, Cat C15 Spacer is a new set of 6 spacers designed for use with Caterpillar engines. Manufactured in the United States, these spacers are part of the original equipment manufacturer (OEM) line and are guaranteed to meet the highest quality standards. With a manufacturer part number of 282-3731, this set of spacers is essential for maintaining the proper functioning of Caterpillar equipment.