PRodacy wrote:
Be cautious about switching to a grade 8 bolt. Different steels and heat treatments are designed for different applications. Grade 8 bolts are very strong in tension (like when you bolt two pieces of matL firmly together), but they are much more brittle than other grades. A sharp shock, which happens often when towing, can shatter a grade 8 bolt whereas a grade 5 bolt will absorb the shock. It may bend, but won't shatter.
Do you have any documentation to support your claim a grade 8 bolt will shatter?
Take a look at this YouTube video.
Grade 8 vs grade 5 bolts