The below engine parts Cummins 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. PLUG,THREADED 5267095F DCEC Cavity Plug 4936545 PLUG,THREADED 3930881F DCEC Cavity Plug 4936564 PLUG,THREADED 3089567F DCEC Cavity Plug 4936565 PLUG,THREADED 3904181F DCEC Cavity Plug 4936566 PLUG,O RING 3910248F DCEC …