Since it has a 12mm hex head, I also believe it is a 8mm (8M x 1.25) bolt. I can't remember the lengths.
As far as the "common" pitch comment, not true. Rather, it is "common" to have a 8M x 1.25, a 10M x 1.5, a 12M x 1.75, and so on, BUT that is not always the case.