If you have the time you can send it out to EDM it out or depending on size
a carbide ball burr held steady in a Dremel can 'grind' a hole in it.
Dremel makes lot of tiny tools including diamond impregnated that can do
some damage.
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On Mon, Mar 23, 2020 at 5:21 PM William Claybaugh <wclaybaugh2@xxxxxxxxx>
wrote:
I had a hex drive socket shear off in a fastener today.
The hex sheared at the top of the fastener, of course, so there is nothing
to grab; it also appears to be cocked in the fastener and so won’t just
fall out.
I’ve tried drilling the broken hex but it’s tool steel....
Bill