Description
12mm Spark Plug Thread Restorer
- The rethreader is used to clean up dirty or damaged spark plug threads on Harley-Davidson® TwinCam®, V-Rod® and some Sportster® models.
- The tool consists of a special 12mm spark plug thread with a lead in and flutes. It also has a 5/8″ hexagon with o-ring and female 3/8″ square drive.
- The special 12mm spark plug thread ensures proper engagement.
- The hexagon and o-ring require the use of a 5/8″ spark plug socket, or the female square requires the use of a male 3/8″ square drive.
- The lead in allows for proper alignment.
- The flutes allow for dirt and chip relief.





