For the archives... There is a "class 12.9" but this is a metric designation that is roughly equivalent to a SAE grade 8. Metric head stampings are also different from SAE, and usually indicate the tensile strength of the bolt in metric units. Both bolts are rated with an ultimate yield strength of about 150,000 psi.
I have not yet come across a bolt rated higher than this, but am willing to learn if there is in fact someone who manufactures such an item.
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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