OIL COOLER ACCESS COVER FOR MULTIFUEL ENGINES IN 2.5 TON AND SOME 5 TON MODELS. NOT FOR USE IN M35A3, 809 OR M939 SERIES. 

PART # 10899046 NSN 5340-00-179-5530, 2815-00-179-5530, 5340001795530, 2815001795530, 375422D