Are you familiar with Bowman's "Bowmalloy" bolts? As I was learning about bolt grades and their hash marks (none, 5, 8) I encountered these bolts and have sometimes used them simply because they were available to me. I don't think I ever counted the number of many tiny hash marks that run all the way around the head. I was told they were stronger than grade 8, but know very little about them.
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