They are commonly used on docks and on playground equipment or in cases where it may be difficult to reach the bolt head with a tool.
Due to that reason, they are often used when a more aesthetic look is desired.Carriage bolts feature a slightly rounded head and have no exposed sharp edges when fully fastened. The square shoulder on carriage bolts help to hold it in place while the nut is fastened. Carriage Bolts 1/2in-13 X 10in A307 Grade A Hot Dip Galv Steel 10PK Size: 1/2 inch-13 X 10 inchFeatures a smooth rounded head as opposed to a standard hex headSquare shoulder allows for nut to be tightened or loosened Often used in cases where a protruding bolt head could cause injuryNuts and washers not included, ensure washers and nuts are same diameterThread Type: Coarse, Thread Class: UNC-2A, Point Style: BluntSpecification(s) Met: ASME B18.