Quote:
Originally Posted by wretched73
The higher the grade the higher the tensile so more chance a grade 8 will shear off right?
Where's the engineer at when you need him??
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People automatically think grade 8 is "better", but you don't usually need that for most applications. In some places you actually want the softer bolt
Quote:
Originally Posted by The_Bishop
I figured you would, I was referring to the 'any bolt will do' from Polar Bear.
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That's not what I said at all. Actually a pin would probably be better because it wouldn't have any stress risers since the through bolt in all the engine mounts that I have seen, have some of the thread in the shear point in the mount.
Quote:
Originally Posted by qwikz28
I thought the idea here is to run a stronger bolt that you could torque down harder to avoid the risk of it rattling loose over time?
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In this application, stretch should be stretch, but I am not an engineer. If you're worried about the fastener backing off from vibration you need some sort of interference to prevent it, no amount of stretch is going to stop that in a high vibration environment. Watch to see how much a fastener will spin when it is under high vibration
https://youtu.be/IKwWu2w1gGk?t=2m30s