8Mm Tap Guide - Lisle 71420

Product Information

A thread repair tool is a specialized device used to restore or create threads in damaged or stripped holes, bolts, or studs. It allows fasteners to be reinstalled securely without replacing the entire component. Common types include thread chasers, taps, dies, and insert systems such as Helicoils, which create new threads inside worn-out holes. These tools are widely used in automotive repair, machinery maintenance, and metalworking to extend the life of parts and ensure reliable fastening.

• Threads remain loose or do not hold fasteners securely after attempted repair.
• Difficulty cutting or reshaping threads due to worn, dull, or broken tool edges.
• Cross-threading or further damage to the material caused by improper tool function.

About Lisle

Founded in 1903, C.A. Lisle started the company with the first product being horse-powered water well drilling machines. On the off season to the well drilling business, they manufactured washing machines, cream separators, and push-type reel lawn mowers. In the mid-20s, Lisle Corporation made its first automotive product, a master ignition vibrator for Ford Model T vehicles. The first Lisle tool, a valve refacer, fast became a repair shop must since valves were reground every 20,000 miles at that time. In the 1930's they also manufactured magnetic oil drain plugs that were used in WWII for military equipment resulting in the Army/Navy E Award for manufacturing excellence in supporting the war effort. In the 1950's after the war, the automotive aftermarket boomed and demand for specialty automotive tools increased. It was then that the Lisle Corporation made the decision to grow the company by introducing new tools that could be made in the company's own factory, thereby controlling quality, delivery and costs. Today the company's tool line consists of more than 400 products of which most are produced at the original location, now expanded, in Clarinda, Iowa.