H. Paulin 3221-M12F Papco M12-1.25 x 18mm Metric Perma Thread Inserts-Spark plug, 6Pcs

3221-M12F; M12-1.25 x 18mm Metric Perma Thread Inserts-Spark plug 6Pcs. Perma-Coil Kits universally accepted method of repairing stripped threads in all types of materials. By using Perma-Coil Kits, damaged threads can be brought back to the original thread size, and better than new. Thread wear, corrosion and galling will be virtually eliminated, and the assembly will be stronger than the original with CoilThread inserts. Thread Size: M12X1.25. Drill Size: 31/64. Brand: Papco, Inches-Metric: Metric, Diameter: M12, Threads Per Inch: 1.25, Product Length: 18mm, Product Size: M12-1.25 x 18mm