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Spark Plug Kits
All spark plug kits contain a Tandem tap instead of a clearance drill and tap. The first lead of the Tandem tap locates on the existing thread of the hole in the cylinder head. By following the existing thread, the thread form for the wire insert will be re-cut at exactly the correct angle.

For tapping through holes and blind holes. The lead chamfer permits easier starting and requires less torque than bottoming taps.

Spark Plug Kits
All spark plug kits contain a Tandem tap instead of a clearance drill and tap. The first lead of the Tandem tap locates on the existing thread of the hole in the cylinder head. By following the existing thread, the thread form for the wire insert will be re-cut at exactly the correct angle.

14 x 1.25mm Spark Plug Thread Repair Kit

12.00mm Spark Plug Tap - Finishing

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