Cleaning up mildly deformed bolt head

[stickshift]

This is a 12mm caliper bolt. The head is slightly deformed. I can get a 6pt socket on it, no problem. Cannot get my spline drive wrench on it.

I could use it as is, but while I've got it off, figured I'd ask if there's an easy way to clean this up a bit - maybe a file? I don't think it's worth the effort of taking it down to 11mm.

Pictured with its companion caliper bolt for comparison:

 

[The Cobbler]

just clean it up with a file

 

[OHMS LAW]

I bought the new flank drive sockets for this purpose. I’d try to source another bolt and pin. Autozone usually has them

 

[pendragon1998]

I think it's usually best to replace damaged fasteners. The problem will only be worse next time. Be glad you could get it off and replace with a new one.