Stainless Steel Carriage Bolt is mainly used to fasten metal or wood with metal on it. The head of the bolt is round. These are different types of the bolts such as stainless steel knurled neck carriage bolts, plough bolts as well as timber bolts. Stainless Steel Carriage Bolt is used to hold the wood with metal together. This type of bolt allows the bolt to be self-locking when placed through a square hole, especially when dealing with metal.