update: I went and followed the advice some of you gave and still no luck. I used a different tool this time so I can see if the pin is actually spinning with the nut or not. I can positively say that the pin is not moving but the hex is. I don't know how its possible... but it is. I can't tighten nor unscrew the hex, it just spins in place. I tried various techniques... nothing works I hate giving up half-way into the job