Thread tap and the drill material: HSS (High-speed Steel). Check that thread and pitch of the tap and the bolt match. To repair a spark plug thread no Pre-drilling is necessary if using the special Spark Plug Tap.
5 x TIME-SERT® M12 x 1.5 x 24mm Thread Repair Inserts - M12 Helicoil Replacement
5x TIME-SERT® M12 x 1.5 x 24mm Thread Repair Insert - M12 Helicoil Replacement
TIME-SERT® M12 x 1.5 x 24mm Thread Repair Insert - M12 Helicoil Replacement
TIME-SERT® M12 x 1.75 x 12mm Thread Repair Insert - M12 Helicoil Replacement
13Pc Tap & Die Set for Wheel Studs & Nuts Thread Repair M12 x 1.25 M12 x 1.5 M14
TIME-SERT® M12 x 1.5 x 16.2mm Thread Repair Insert - M12 Helicoil Replacement
