Quote:
Originally Posted by MattW
I suspect the "problem" might actually be that they have matched the screw head angle to the countersink angle on the chassis.
Now obviously this is what you should do - but it does mean that the screw will grip the carbon very tightly - which is why you struggle to get them out!!
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Matt, I have never seen this happen on its own, however it could be a contributing factor to the problem, poorly formed fastner + galling effect + resistive surface friction from the fastner head.
Jimmy, the best way to remove the errant fastner is to drill the head off with a 3.1-3.2mm drill, (be carefull to just remove the head as you dont want to remove any of the shank, as this is what will provide you with the gripping surface) then remove all the other fastners, remove the bulkhead and then apply a liberal dose of WD40 or another penetrating lubricant and unscrew with a set of mole grips.