Don;t go over the spec. You can stretch the bolt too much. I had to learn about it since I have to teach this stuff to people. People don;t know that when you tighten a bolt, you stretch which is how it really holds. Too much stretch, it does not retract enough to keep pressure on the threads. If it is a plated bolt, you have to reduce the torque. It is voodoo science. Tell ya what, put some mild Loctite on the bolt and do it to spec.
