Way back in 1979 I had to remove a seat bolt to get my build sheet out. Long story short, the bolt broke putting it back in. What is the size, length, and thread of the correct seat bolt and what are the head markings? Does anybody have one I can buy? TIA You are probably saying why not just look at the other bolts and match. I would except I am not home and will be on a business trip for at least another year. Would like to get the part now and have there when I get back.