Grade 5 or Grade 8??


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Posted by Tex on September 22, 2000 at 08:35:50:

I've heard that in general all automotive bolts (except maybe bumber bolts) are grade 5, and that GRADE 8 bolts are refered to as tractor bolts. Grade 8 bolts are harder and have more shear resistance, but are more brittle and can fail under a sharp blow. Any ideas where grade 8 bolts would be needed on a power wagon? Imparticularly I'm wondering about the bolts that hold the front motor mount bracket to the cross member. Thanks.




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