Torx head screw, 55mm stretch bolt
Order 1 screw for each injector
Sprinter II 2007-2018
It is critical that new screws and copper seal rings be fitted any time that injectors are removed and replaced. These are the original Mercedes Benz screws and are not a hardened bolt. They are a "stretch bolt" or as more formally known, torque to yield. Do not use any other bolt on your injectors and never re-use an old bolt/screw.