Thread Repair Tools

External Thread Restorers and Files

Choose a tool for the thread on the outside of the fastener. Look for a matching fixed-size restorer or a file face that covers the exact pitch you need.

What to check before ordering

A mixed inch and metric set can be useful if you maintain several sizes. Read the list of tools rather than the piece count. Compare the external-thread tools in a set separately from any internal chasers, and check the exact pitch coverage for the files.

Files and adjustable restorers

A file has specific marked pitches. A jaw-style tool has a diameter range and its own access requirements. Check the fastener and surrounding space before choosing either.

Dedicated dies and sets

Use the documented coarse, fine or metric designation. The diameter alone cannot tell you whether a die from a set fits.

Compare documented examples

Manufacturer references

Frequently asked questions

Does a mixed set contain an external restorer for every size it lists?

Use the maker’s contents table to match each listed size to its tool type. Some sizes may be covered by an internal tool only.

Which feature matters on a multi-face thread file?

Check the pitches listed for its working faces. Compare those values with the verified thread and then check the tool’s working length and clearance.

Buying guides