Jim, I tend to agree. I did some homework, and they do make a Grade 5 carriage bolt, but I had to special order them. The D-rings have stainless carriage bolts, and they are within 15% of grade 5. Grade 8 only comes in hex. The stainless bolts on the D-rights are 3/8". The decking boards are held down with the 5/16 carriage.
Bottom line, this is only going to be used locally, and top speed on the old girl is a blazing 47 MPH, downhill, with a tail wind! :lol: Although, I do not take it lightly that a snapped bolt during a quick stop would be disastrous.
Jim, I'll double check the stainless tensil numbers and failure point. I might swap them out.
PS. The D-ring brackets are for 3/8" bolts. I didn't have much choice on the size........
This post was edited by Tom Fleming at 16:40:18 09/16/12.
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