A Complete Guide to Carriage Bolts
Fasteners are a crucial component of construction, allowing for a variety of parts to be affixed together through mechanical means. Through permanent or non-permanent installation, fasteners can help distribute loads, establish primary connections for structural areas, and more. Carriage bolts are a widely used type of fastener, providing for various applications with their design and capabilities. In this blog, we will discuss the various common types of carriage bolts, helping you better understand their use and benefits.
Carriage bolts, also known as coach bolts, are metallic bolts that are utilized for fastening metal to metal or metal to wood, and they are most often distinguished by their shallow mushroom head and square shank cross-section. Carriage bolts get their name from their original use, which was to construct carriages and attach their wheel during the 1800’s. Additionally, carriage bolts serve a variety of specific applications that involve the construction of wood, carpentry, and fastening wood based materials. With their shape, carriage bolts can be installed into components with a pre-drilled hole, and the square necked bolt can be self-locking when placed in a square hole. Nevertheless, carriage bolts may also be used to fasten wooden components with a round hole, allowing them to serve a diverse set of installation types.
Depending on the application in question, there are a few common types of carriage bolts that may be used, and these include round head, ribbed neck types, short neck types, flat head, square neck types, and fin neck types. The round head, ribbed neck bolt is typically constructed from low carbon steel, and their shape features serrated or ribbed shoulders and a round head. Due to their construction, such fastener bolts serve best for soft and ductile metals, as well as plastics and woods. Round head, and short neck carriage colts feature squared, short shoulders, and they have a unified threat pitch. Such carriage bolt types are typically constructed from low or medium carbon steel, and their short necks allow them to be useful for sheet metals without causing an obstruction. The flat head, square neck carriage bolt is as its name suggests, and they provide a low profile on either the top or front side of the fastening assembly. Due to their design, the square necked bolt is most often used for garage doors, though they may also be implemented for other applications. Lastly, the fin neck carriage bolt is one that is composed of low carbon steel, and its design features a round head and flat bearing surface. With a 90 degree angle from the bearing surface to the shank, such bolts are most often used for fastening thin plywood.
Despite their original use on carriages and wooden wheels, carriage bolts still serve use in a variety of modern applications. Primarily, carriage bolts see use for carpentry and wood construction, often used for the construction of homes, as well as their maintenance and repair. Beyond safety and reliability, many choose to use carriage bolts in particular due to their aesthetic design, and they often decorate wooden decking, fencing, and play equipment. Due to their method of fastening, such bolts are also useful for security as they can only be unbolted from one side, preventing easy unscrewing.
With their design, carriage bolts serve a variety of wood and metal applications for attaching components together. When you are in search of fastener components that you can steadily rely on for your assemblies and operations, let the experts at AOG Purchasing help you source everything you need with competitive pricing and rapid lead times. AOG Purchasing is a premier supplier of aviation components, and we can help you source different types of bolts and fasteners that cater to a variety of uses. Get started on the purchasing process today and receive a personalized quote based on your individual needs.
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