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      03-14-2013, 09:43 AM   #11
elwesso
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Drives: Z4 M Coupe
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Studs and bolts are the same in regards to the torque...

Here's a quick lesson on fasteners. Think of a bolt (or stud) as a spring.. Essentially what you are doing when you tighten a bolt is you are stretching it, which puts pressure on the joint. Theoretically, you want to tighten (or stretch) the fastener as much as you possibly can within the elastic limit of the material..

The *best* way to ensure a fastener is correctly tightened (stretched) would be to measure the length before and after (or the change in length), one can easily calculate the length that the bolt should be in a perfect world. This is pretty impractical to be able to do, especially when you're threading the fastener into a tapped hole.. Since it's difficult to measure this change in length, you can also determine the torque required at the bolt head to attain this change in length, however you are making some assumptions that aren't ideal, in that it's impossible to generalize the friction in the threads and whatnot...

With all that said, I agree that the torque in this application really isn't that important. If you're concerned about it coming apart, use some nord-lock washers and it will never come apart!
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