On Wed, 31 Mar 2004 10:04:23 +0100, Dan Gravell
wrote:


Now, the problem is that when I went to install the thermostat, I
realised the screw's inside has become threaded, in that it is almost
circular and not hexagonal any more.

Allen keys come in both metric and imperial sizing - is it possible
you have used the wrong sort? If so the correct type might just
still work. (To make life interesting they are not marked in any way
so you can tell which is which).

If it is the correct one sometimes flattening the end on an oilstone
to give it back a good flat surface will enable you to get a bit of
grip.

--
Peter Parry.
http://www.wpp.ltd.uk/