17.5 mm Solid Insert M14x1.25 Spark Plug Thread Repair.

2 off M14x1.25 inserts 17.5 mm Long. Internal Thread of Inserts M14x1.25. These inserts are only suitable for use with the V-Coil Special Tap M16x1.25.see Link To Tool Below. External Thread of Inserts M16x1.25.

eBay