Powerbuilt 14mm Back Tap Spark Plug Thread Repair Tool, Straightening Tool, Motorcycle Spark Plugs, Repairs Damaged Threads, Collapsible Design - 640811

The Powerbuilt 14 mm Back‑Tap Thread Repair Tool (Model # 640811) solves the frustrating problem of fouled or damaged spark plug threads without costly engine teardown. Its patented collapsible design allows the tool to be placed through a spark plug hole, expanded inside the cylinder chamber, and then drawn back up — re‑cutting and cleaning the threads while bringing debris and filings with it instead of letting them fall into your engine.

Built from heat‑treated 4118 steel and engineered to meet or exceed ANSI standards, this professional grade thread repair tool is a time‑saving addition to any automotive toolkit. It helps restore proper spark plug seating in applications with 14 mm thread holes — without the need to remove cylinder heads or resort to thread inserts. Whether you’re a professional mechanic or a dedicated DIYer, this tool helps keep engine repairs straightforward and efficient.