I thought I could do it but this is the result :
The bolt is a M4 counter-sink socket-head. Before I screw it up further, I would like to seek advice from members of this forum. There are tools out there designed for extracting bolts or screws with stripped head but my impression is that they are for bolts of larger sizes so I don’t think they are the solution to my problem. I can drill out the head easily but doing so will leave the body of the bolt fully buried in the hole and I guess that will be a more difficult problem. The hole is a through hole.
May I have some suggestions pls ? Thanks in advance.