What ifffff.....The head of the bolt snapped..and there happened to be Thread Lock on the other end :nec:

 

This happened to me a couple months ago when I was trying to get these stupid screws off of a rotor. I ended up drilling a hole in it and tapping a screw extractor into it and then twisting it out. It would have worked better if I drilled the hole deeper, but it got enough of the screw out so that I could get the rotor off.

 

i have had those break on me inside the bolt.. making it a permanent bolt... GRRRR