Just for those of you who are going to buy some of these items, from personal experince I had great difficulty getting someone at multiple stores to even know what a carriage bolt is, I talked to at least 20 people and nobody was able to figure it out. So I hope this makes it a little easier to find at the store or your shop, heres a picture of a carriage bolt:
The list asks for 8, 3/8-16 x 4 carriage bolts