Help!

[NickTB]

The screw is probably steel - can you check it with a magnet? Even most stainless steels will stick to a strong magnet. Drilling it out is definitely high-risk if the screw is harder than the frame. If it is steel, heating the dropout with a heat gun or hairdryer will help loosen its grip as the frame hole will expand by more than the screw, but you still need to get hold of it somehow. I'm assuming it's M4 or something equally tiny? It may be a job for a professional.

Yes, it’s an M3 or 4 screw. Tiny but painfully difficult to get rid of. Sounds like my kids

 

[rogerzilla]

Even an Easy-Out is a risk (they rarely work anyway) as they need a pilot hole, and drilling a 1 or 1.5mm hole in the centre of that screw could be interesting, especially if it's stainless and therefore rather hard.

Some suggestions here: https://chemistry.stackexchange.com...solve-steel-without-affecting-aluminium-alloy

Alum (potassium alum solution) seems worth trying if you don't want to make it someone else's problem.