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.
5 & ASTM F593/1 Due to that reason, they are often used when a more aesthetic look is desired. Carriage Bolts 3/8in-16 X 3-1/2in Grade 18-8 Stainless Steel 10PK Carriage bolts feature a slightly rounded head and have no exposed sharp edges when fully fastened..Size: 3/8 inch-16 X 3-1/2 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.