What are carriage bolts used for?

Carriage bolts, also known as coach bolts, are a type of fastener designed for specific applications where a smooth, finished appearance is desired on one side of the joint. These bolts have a domed or rounded head and a square neck beneath the head. The square neck is designed to fit into a square hole in the material being fastened, preventing the bolt from turning when tightened.

Carriage bolts are commonly used for various purposes, including:Woodworking: They are frequently used in woodworking projects, such as attaching wooden components like beams, posts, or planks, where a neat and finished appearance is desired on one side.Construction: In construction, carriage bolts are used for joining wooden structures, like decks, fences, or outdoor furniture, where a secure and aesthetic connection is needed.Automotive: Carriage bolts are also employed in automotive applications, particularly in older vehicles or for specialty applications where a smooth, rounded bolt head is preferred for aesthetic reasons.Utility and Industrial Use: They are utilized in various utility and industrial settings where a secure fastening method with a clean appearance is necessary. This includes machinery, equipment, and structural assemblies.Carriage bolts are typically installed by inserting them into pre-drilled holes in the material, with the square neck preventing the bolt from rotating while the nut is tightened on the other end. The smooth, rounded head of the carriage bolt provides a finished appearance and reduces the risk of snagging on clothing or other materials.

Overall, carriage bolts are chosen for their ease of use, secure fastening capabilities, and ability to provide a clean and finished appearance on one side of the joint.