On 25/11/2013 13:02, Chris J Dixon wrote:

Access is only from above. The screw is in a recess, and close to
a raised surround, making it pretty tricky to get at. Removing
one of the ordinary screws in the symmetrical location reveals it
to be a self tapper about 20 mm long.

Have you considered trying to over-tighten it such that you strip the
threads from the hole?

Then using a slightly larger diameter self tapper to replace it. (or
filling the stripped hole with epoxy etc).


--
Cheers,

John.

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