The below engine parts Cummins retaining ring are for the 4BT3.9/6BT5.9/6CT8.3/6LT8.9/ISDe/ISLe/ISZ/M11/NT855/ KT19/KT38/KT50/ISF2.8/ISF3.8/ISM11/QSM11 series Cummins engine. Part Name Part No. Part Name Part No. Retainer Plug 179063 DCEC Retaining Ring 3900242 Retainer Plug 3895718 DCEC Retaining Ring 3901764 Cover Retainer 4913659 DCEC Retaining Ring 3892090 Connection Retainer 3102571 DCEC Retaining Ring …