Thread Repair Files
Thread Repair Files help breathe life back into bolts, screws or fittings that have been damaged due to cross-threading or corrosion.
Made of high carbon steel, the Repair Files offer 4 to 8 different thread pitches.
In addition, the Thread Repair Files can also be used as a screw pitch gage. Black oxide to prevent rust.
We have consulted with our experts and we do not know what a flat thread is. Can you please elaborate?
A 5/8" bolt has 11 threads per inch for a coarse thread and 18 threads per inch for a fine thread so you need the GT177-1