One option is to pick up a longer bolt, 5-10mm more might do the trick. Depends on which bolt it is and how deep the hole is, but I have used that trick a few times to pick up some fresh threads deeper in the hole. And use anti-sieze on the threads. If tapping, go up to the next larger size (metric or SAE). For example, for 8mm, use 3/8-24, for 10mm, use 7/16-20.

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