The below engine parts Cummins expansion plug 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. Expansion Plug C3905368 Cummins Expansion Plug 3900956 Expansion Plug C3905401 Cummins Expansion Plug 3905368 Cummins Expansion Plug C3912900 Cummins Expansion Plug 3920706 Cummins Expansion Plug C3914035 Cummins …