Stop in for a cup of coffee

Regular carriage bolts have a smaller head than what originals do. I think mine is a 3/8 bolt, and I know the head is wider. They will work, but think it could pull through if overtightened.
Regular carriage bolts are just a little smaller in diameter but I plan to add a couple of washers and a nut to hold it in place so it should be fine. Besides, a flopping around bolt makes it a pain to put the tire in the well. They should have anchored it with a nut from the factory.