On Sun, 3 Mar 2019 00:09:12 +0000, Nick Odell
wrote:

Altogether, one, two, three: ANGLEGRINDER!!!

Seriously - and maybe this is what Jim was thinking of - could you slice
through the timber with an anglegrinder in such a direction that
inserting a new splint of wood will give the structure its strength back
and also cut through the shaft of the bolt in such a place that you can
pop each severed half out of there?

But why? Cut a slot in the head, insert screwdriver in slot, hold head while
recessed nut is turned by the socket...

Beware of metal sparks setting dry
timber on fire!

That. And sparks hitting glass and burning in...


Thomas Prufer