For projects that require wood-to-wood connections, carriage bolts are the ideal choice. A carriage or coach bolt is distinguished from others by the shape of its head: a rounded head and a square shoulder, together, resist turning when the nuts tightened or removed. This particular shape makes the bolt self-locking when placed in a square or round hole, in most woods. Used for a variety of applications, from dock or deck construction to playgrounds, these bolts are ideal when a smooth finish is needed. Browse our extensive selection of bolt grades and sizes below. and if you don’t see what you’re looking for, send our knowledgeable staff an email or contact us at 866-463-2910.