Papa GLS, The bolts are 1/2 inch if my memory serves right. There are four per bracket, I have not seen any signs of failure. Some other post I was looking at when trying to make my choice said the shocks themselves were not the best, but when that time comes I will pick up some new ones locally. It's not like it's on the road every day.
The bolts may be 3/8. The trailer is back at the factory now, otherwise I could take pick for you.
"DON'T FORCE IT - GET A BIGGER HAMMER'
"Paul & Laurie"
2013 Columbus 340 RK
2013 F350 Dually 6.7 Diesel