So, I had a rounded off screw in my phone and after all else has failed I need to drill it out. How big a drill bit should I be using? I believe the screw is 1.4mm wide.
Any other advice/tips on the actual drilling it out process are appreciated!
Thanks
I have about 20 stainless steel bolts (1/4 20) that I managed to remove from aluminum plates. The threads on the bolts are covered with oxidation what's a good product to remove aluminum oxide on steel fast? I tried vinegar it works but some threads still have the white coating on and I have to use a dentist tool to remove all the oxidation. Also what could I use to prevent oxidation when I put all those bolts back on? Clear nail polish or low strength thread locker? Anything else on the market?