How to repair stripped bolt and hole threads

Use a thread file or thread chaser to repair stripped bolt and hole threads

You can fix stripped threads with these thread repair tools. They’re available at most auto parts stores

Buy a thread file set or threaded hole chasers

To fix stripped threads on a bolt or shaft, use a thread file or a thread chaser

How to use a thread file

Use a thread file to restore stripped threads when the starting threads are deformed. Or, use a thread file and oil to clean rusted threads.

How and when to use a thread chaser and threaded rod/bolt chaser

If you’re trying to restore threads on a bolt or axle shaft and the starting threads are in good shape, use a threaded rod/bolt chaser. Simply apply oil to the threads and screw on the chaser using a deep socket or box end wrench. When you reach the damaged threads, rotate the chaser back and forth to reform the threads. Don’t try to do it in a single turn.

If you’re trying to restore stripped threads in a tapped hole, use the threaded hole chaser and oil.

This image shows a threaded hole chaser being used to reform the threads in a nut. But the technique is the same to reform the threads in a threaded hole

©, 2023 Rick Muscoplat