I purchased some of the official gold Unistrut brand bolts and I believe the markings were actually grade 5.1 or 5.2 There's nothing wrong with using standard Unistrut or "Super Strut" brand bolts. What I was meaning is don't go buy your bolts from the bin of Chinese crap at Home Depot. Buy good ones.1. I don't recall ever seeing grading on Unistrut hardware.
My bad, I was talking about the original question, not the threaded rod.2. Do you know of a source for Grade 5 or Grade 8 1/2"-13 threaded rod?
I know you are an old dog... care to learn a new trick? Check out the bottom half of this chart for standard ASTM markings on nuts.3. How do you tell what grade the nuts are?
You should know better than to try to teach me anything....I know you are an old dog... care to learn a new trick? Check out the bottom half of this chart for standard ASTM markings on nuts. ...
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