YOU MIGHT WANT TO BUY GRADE 8 NEW BOLTS.. THEIR HARDENED, AND WON'T TWIST OFF LIKE SOFT STEEL BOLTS AFTER THEY HAVE SET FOR YEARS.
JUST GO TO NAPA OR HOME DEPOT
SHOULD BE ABLE TO FIND THEM
DONT OVER TIGHTEN PUTTING BACK IN. YOU CAN USE BOLT AND SEPERATE WASHER.. ID USE LOCK WASHER.