Thank you men,
I have examined the bolts in question and except for the 7/16" x 20 x 11/4"(trans.-1/2 shafts) which are grade 8 all the others are clearly marked 8.8.The company I plan to purchase the stainless fastners from (Totally Stainless)say that a grade 5 stainless will be with in factory specs.
Thanks Again
Vince
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