I am a senior design Engineer, having to do FEA on structures and having to justify bolt size and pattern and forces in all kinds of applications. As for doing studies that would be beneath my job specs. Although I have had them done by others. I've done all kinds of jobs on my way to where I am now. It was my love of cars that got me into Engineering. It amazes me how we jump to the internet to get an answer, when you can go to a world class firm like ARP who actually makes this information available. And as I suspected, they consider a fastener torqued past yield as a failed fastener, their published number is actually .0005 of an inch.