Carriage Bolts

Understanding Carriage Bolts

What Are Carriage Bolts?

Carriage bolts, also known as coach bolts, are a type of fastener used in woodworking and metalworking projects. They feature a rounded head with a smooth shank that is often square at the base. This design helps prevent the bolt from rotating once it is inserted into a pre-drilled hole. Carriage bolts are popular in applications where a strong connection is needed, and they are commonly used in furniture assembly, deck construction, and more.

Benefits of Using Carriage Bolts

One of the key benefits of carriage bolts is their ability to provide a secure hold. Their unique design allows for easy installation, and they can be tightened from one side, which is convenient. Unlike other fasteners, carriage bolts resist loosening due to vibrations. Because of this, they are ideal for outdoor projects, such as building fences or railings, where exposure to the elements may occur.

How to Use Carriage Bolts

Using carriage bolts is relatively straightforward. First, drill a hole in the materials you want to join. Next, insert the carriage bolt through the hole from the underside, allowing the square part of the shank to settle into the material. Then, secure it using a nut and washer on the top side. This method creates a strong joint, making carriage bolts a favorite among DIY enthusiasts and construction professionals alike.