Spark Plug Gap Tool

A simple tool used to precisely and uniformly adjust the gap between a spark plug's electrodes. Use a 10mm socket screwdriver to slowly apply pressure and measure the gap with a feeler gauge kit.

The tool was designed to fit a NGK 91006 plug, but should work for any 16mm socket size plug using a similar design.

The tool uses a **M6 nut** and **M6 x 40mm bolt**.
A 1/4-20 bolt and nut could probably be used as a substitute, but fitment is not guaranteed.

Printed in **PETG** using a 0.6mm nozzle and 0.3mm layer height.
Using a 0.4mm nozzle should not negatively impact strength.

I have included the STEP file if you need to edit the dimensions to fit a different spark plug model.