First, does anyone know what this grade marking means on this 1/2" x 20 tpi bolt? I can't find it as a standard grade marking. I assume it is grade super strong of some sort.
Second item: I bought some grade eight bolts the other day and found this in the bag. I thought there is supposed to be some sort of quality control on these things. No, I don't know where it was made but the place I buy them from does NOT sell crap tools of any sort, only top name brands since they supply the local sawmills and heavy equipment shops.
If this sort of thing can get by it makes me wonder what gets through that isn't so obvious.