I'd like to have some 'ball park' figures for the torque which typical
wood screws can handle. Can anyone give me some typical figures or
point me at a web site that has them? I would emphasise that I'm
after the torque figure, i.e. the amount of twist needed to break
them. I realise this doesn't directly relate to the strength of the
screw holding things together which would simply be given by the
tensile stregth of the screw.

I'd prefer the figures for metric screws (i.e. diameters in mm) and in
Nm but I'm quite happy to convert if necessary. The actual screws I'm
using are ScrewFix TurboGold and the stainless steel versions of the
same. I would guess however that most good quality screws are going
to be similar, I'm not after accurate figures, just an idea of what
is likely to break them.

--
Chris Green