My 'nasty' bolts don't equal that drawing, hence the question. So all,please be aware there is a bad batch of these bolts out there! It's not just a one off as bought these twice now with the same issue!
I think John O'Brien, mentioned he had some Danny. Though I also think he's in England now.
If they are getting harder to find and someone can post the original dimensions, it's easy to knock a few up.
I have the hex size now :)