Originally posted by match point
The location would not permit use of a torch. Thanks
Do you mean the area can tolerate zero heat? At this point, your only option really is to drill it out. If it is possible to heat what is left of the bolt red hot a couple of times and let it air cool (even if it's just a small butane torch), you will remove the temper and thus be more able to drill it out. If you are unable to get any heat to it at all you should take it to a machine shop and see if they can get it out for you. That's all I know to suggest.