"William Noble" wrote in message
.. .
the only mirror I have with a wooden threaded part is quite old, the
thread is around one or two threads per inch. Nothing a modern tap would
help with - it might be worth trying to get some idea of what these
threads look like


Hi William,
It seems there 'was' a thread and bolt there at one time, but damage by a
few repairs and heavy glue use have made it impossible to measure any
remaining thread and a new piece will have to be inserted and re-veneered to
try to hide the damage. So he hopes that any thread will work on the new
bolts and inserted pieces.
If the thread was as you describe and he decided to try and match the way it
was, is there an old tool or way of making the threads that size?
Thanks
Anthony