Click here to enlarge Originally Posted by sooty Click here to enlarge
if there's any part still protudring out the top you can cut into it then use a screwdriver to turn it.
Short of that, a drill bit smaller than the screw, drill out the centre and you can essentially pull the remaining thread out once the core is gone.
I'll try the screwdriver thing. How will the remaining thread come out if the middle is pulled out?