Description

A carriage bolt is a type of bolt with a shallow mushroom head and a square section below the head. It's also known as a coach bolt or round-head square-neck bolt. What are carriage bolts used for? Woodworking: Carriage bolts are used to fasten metal to wood or wood to wood. Security: Carriage bolts are used in locks and hinges because they can only be removed from one side. How do carriage bolts work? The square section of the bolt fits into a square hole in the material being fastened. The square section prevents the bolt from rotating while being attached. The smooth, domed head and square nut below prevent the bolt from being gripped and rotated from the insecure side. What are carriage bolts made of? Carriage bolts can be made from a variety of materials, including stainless steel. They can be coated with zinc to prevent rust and corrosion. How are carriage bolts sized? Carriage bolt size is usually determined by the thread size and length.