DECKMATE 1/4 in.-20 x 2 in. Black Deck Exterior Carriage Bolt (25-Pack) 814620 - The Home Depot 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. The square shoulder on carriage bolts help to hold it in place while the nut is fastened. Due to that reason, they are often used when a more aesthetic look is desired. 3 1/2 Inch Carriage Bolts Pack Hex Head Bolt 1/4-20 X 21/2 - Dynamic Dollies & Racks Rounded Head Bolts Pack Use this Crown Bolt Galvanized Coarse Thread Carriage Bolt for fasting wooden material in the furniture industry. Features durable construction Diameter-Thread Size & Length: 1/4 inch-20 X 3-1/2 inch Carriage bolts feature a slightly rounded head and have no exposed sharp edges when fully fastened. Prime-Line 1/4 in.-20 x 5-1/2 in. A307 Grade A Zinc Plated Steel Carriage Bolts (50-Pack Often used in cases where a protruding bolt head could cause injury
