Originally Posted by
Gummomarx
I've bought a set of 3mm HSS bits and I'm going to drill till the cows come home. If the threads are wrecked, nut and bolt will sort.
You could also helicoil the hole to restore the threads. That actually makes the threads stronger, especially in aluminum, with a stainless steel helicoil. My old company's products, aluminum, came from the factory with all threaded holes helicoiled.