A thread restorer (thread file) is a tool used to fix threads on nuts or bolts that have become damaged. One type of thread restorer is a thread restoring file. There are other types of thread restoring tools as well.
Technical Data:
| Material | 40Cr |
| Surface | Black Finished |
| HRC | 45-50 |
| External ONLY | Regular Bolt | Threads | Metric | 0.75/1.00/1.25/1.50/1.75/2.00/2.50/3.00 |
| External ONLY | Regular Bolt | Threads | BSW/BSF | 11/12/14/16/18/20/22/26 |
| External ONLY | Regular Bolt | Threads | UNC/UNF | 12/13/14/16/18/20/24/28 |
| External ONLY | Regular Bolt | Threads | BSP/PF | 11/12/14/16/19/20/22/28 |
