On Sat, 27 Feb 2010 11:47:14 -0000, "Grumps"
wrote:

Hi

I have a need to screw into some sheets of acrylic. I have some 1/2" #6
screws. I believe this is 3.5mm in metric speak. But is that the hole size I
have to drill?
Ta.


Dunno what the right answer is but make sure you choose carefully
otherwise you'll get the dreaded "Spider Web" result