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Posted by gmharris [71.105.35.169] on Saturday, August 18, 2012 at 12:35:11 :
In Reply to: Re: Trouble in Power Wagon Land posted by Roger Aspinwall [99.104.190.67] on Saturday, August 18, 2012 at 09:45:09 :
By the time grade 8 bolts fail, grade 5 bolts would have been long gone. That's why you pay more for grade 8 bolts.
Grade 8 bolts are less flexible, but that doesn't come into play until well after the grade 5 bolts would have failed.
Bolts usually hold by "clamping action" which is limited by the tensile strength of the bolt. That's why you should use higher torque with a grade 8 bolts to take advantage of the increased strength.
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