OK, I had to google "sex bolts" to see what they were, and holy cow! This is what I have been looking for high and low, calling up fastener vendors all over the place with no luck. I had never heard of the term before.
OMG! 40+ years in the structural steel business, countless AISC, RCSC, TSSI meetings and I've NEVER heard the term before. I really thought it was a typo for hex bolts and was nonplussed when he mentioned countersunk. Never too late to learn something new.
