I need to remove about 80 rusted 3/8 bolts/nuts to repair a steel fire escape. The unit itself is in good shape but the angle iron and bolts holding the treads to the stringers need replacement.
These bolts and nuts are really old, probably from 1920. Square heads. Heavily rusted. Some with easy access only from the nut side. I know for sure that none of them will break free with a wrench even if I could get square sockets to fit them. I really don't want to torch each one individually and try to wrench them apart - that sounds like way too much time. The nut splitter approach would be a long day. Impact chisel looks bad too.
Is there any sort of flat blade that I could use in a die grinder to cut a slot through the nut ? I do that with those thin dremel blades in small quantities but there are lots of these. Other ideas ?
Bob