Carriage Bolt
Carriage bolts are mostly used in wood to wood fastening and general construction of decks, porches, swing sets and other home auxiliary units. It comes with a square shoulder and round head which can resist turning when the fastener is being tightened or removed. This ensures that the structure being built is sturdy and robust. The differentiating factor between these bolts and regular bolts is the dome-shaped head - the bolts are not meant to be screwed directly onto surfaces.