Description
- Spark Plug Thread Repair Workshop Kit
- Pro-Thread Kits offer a cost-effective method of repairing and strengthening threads in various materials such as cast iron, steel, aluminum, and other metals and plastics
- Effective for automotive repair, spark plug ports, outdoor power equipment, motorcycle repairs, farm equipment, and more!
- Easy to install, just DRILL, TAP, INSERT, SNAP!
- Pro-Thread inserts provide a permanent wear resistant internal thread
- Stainless steel inserts resist the effects of temperature and corrosion
- Wire inserts help to compensate for the thread and pitch angle errors
- Repaired threads are generally stronger than the original parent material thread
- Kit includes STI Taps Pilot Nose Taps, Tools and Inserts*:
- 38109 Spark Plug Repair Kit – M10 – 1.00 – Non-Tapered Seat
- Includes Tap, (5) .339″, & (5) 1/2″ Inserts
- 38129 Spark Plug Repair Kit – M12 – 1.25 – Non-Tapered Seat
- Includes Tap, (5) ½”, & (5) 3/4” Inserts
- 38149 Spark Plug Repair Kit – M14 – 1.25 – Non-Tapered Seat
- Includes Tap, (5) 3/8”, (5) 1/2”, & (5) ¾” Inserts
- 98181 – Spark Plug Repair Kit – M18 – 1.50
- Includes Tap, (5) 1/2″ Inserts
- 98141 – Spark Plug Repair Kit – M14 – 1.25 – Tapered Seat
- Includes Tap, (5) 3/8”, (5) 1/2”, & (5) 3/4” Inserts
- 38109 Spark Plug Repair Kit – M10 – 1.00 – Non-Tapered Seat
*In some cases, the individual Spark Plug Repair Kits will have fewer inserts than what is included in the 98199 Master Kit





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