On Mon, 15 Jun 2009 11:29:59 -0700, "Calif Bill"
wrote:

A better process might be to drill a hole first to get an edge to
heat.

Back about 1976 I broke a carb mounting stud. Then I broke off the
screw extractor. I put a little ball of fine wire on top of it, for
ignition, with a borrowed cutting torch. I have heard you can burn a
broken tap out of a rifle receiver when a scope mounting job goes
sour.

Casady