Quick Facts
When it comes to fasteners, one type that stands out for its unique design and versatile applications is the carriage bolt. Also called a coach bolt, these fasteners are known for their distinctive appearance and reliable functionality. They are ideal for situations where access to the backside of the connection is limited, as they don't require tools on both sides during installation.
This specialized fastener has a distinct head design. Unlike traditional bolts with flat heads or hexagonal heads, carriage bolts have a smooth, rounded head that's often mushroom-shaped. This head is accompanied by a square section immediately beneath it, designed to grip into the material (likely wood) as the nut is tightened, preventing the bolt from rotating during installation. The other end of the carriage bolt features a threaded shaft, allowing it to be securely fastened into a receiving material.
It’s worth noting that carriage bolts are not the same as dome head plow bolts due to the thickness of the plow bolt head’s dome.
Where are carriage bolts used?
Carriage bolts find utility in a wide range of applications due to their unique design and secure fastening capabilities. They are ideal for situations where access to the backside of the connection is limited, as they don't require tools on both sides during installation. Some of the most common uses include:
Woodworking Projects: One of the primary applications of carriage bolts is in woodworking projects. They are commonly used to fasten wooden components together, such as connecting beams, posts, and joists. The square section beneath the head prevents the bolt from turning while tightening the nut, making them ideal for applications where access to both sides of the joint is limited.
Outdoor Structures: Carriage bolts are frequently employed in constructing outdoor structures like decks, fences, and pergolas. Their robust construction and resistance to pull-out forces make them suitable for anchoring heavy wooden elements securely.
Automotive Industry: In certain automotive applications, such as securing seats and interior panels, carriage bolts can be found. Their secure fastening capability makes them suitable for areas where vibration and movement are a concern.
Construction and Infrastructure: Carriage bolts also have a place in the construction industry, used to fasten structural elements together, especially in situations where access to the rear side of the connection is limited. They are often employed in the assembly of scaffolding and temporary structures.
Carriage Bolt Specifications
