* AFTERMARKET.EXPRESS is not an authorized dealer for Caterpillar and we don't represent it. Our
catalog contains replacement parts manufactured with high quality standards but not Original
Equipment from the Manufacturer. We use original product codes, photos or schemas only for
reference purposes. The image of the product is provided as a
reference and may differ in appearance from the ordered product. Use the original part number to
find the parts or replacements you need.
About spare part 4I6397
4I6397 - BACKUP RING fits Caterpillar (Aftermarket Parts)
Material Description: PTFE provides superior performance in Air, Engine Oil, Diesel Fuel and Coolant applications, but is sensitive to installation damage and debris. It works well at very high temperatures.
