Carriage Bolts

Carriage bolts, also known as coach bolts or round head square neck bolts, are a type of threaded fastener with a smooth, rounded head and a square or rectangular shank beneath it. The shank is typically threaded for a portion of its length, allowing for easy installation and tightening with a wrench or socket.

Types of carriage bolts

Stainless steel carriage bolts are corrosion-resistant and are widely used in outdoor or marine applications where exposure to moisture or chemicals is a worry. They are available in various grades of stainless steel, such as 304 or 316, depending on the level of corrosion resistance needed. Galvanized carriage bolts have a protective zinc coating applied to the surface, providing corrosion resistance. They are commonly used in indoor applications or where moderate corrosion resistance is required. A flat head carriage bolt is a type of carriage bolt that has a flat, countersunk head instead of a rounded head. The flat head allows it to sit flush with the surface when installed, leading to a smooth and finished exterior. The flat-head carriage bolt is designed to be used in applications where the bolt needs to be countersunk or flush with the surface. This is often desired in woodworking projects, cabinetry, or furniture assembly, where a flush and seamless finish is important.

Features of carriage bolts

The primary function of carriage bolts is to offer a secure and stable fastening method. The square or rectangular neck beneath the smooth, dome-shaped head prevents the bolt from rotating when tightened, ensuring a strong and secure connection. Carriage bolts are produced to resist pull-out forces, making them suitable for applications where the joint needs to withstand tension or pulling forces. The square or rectangular neck helps to distribute the load and prevent the bolt from pulling out of the material.

Besides, carriage bolts are relatively easy to install. The smooth, rounded head makes easy insertion into pre-drilled holes possible, and the square or rectangular neck keeps the bolt in place during tightening. This ease of installation makes carriage bolts a popular choice for various projects. In addition, carriage bolts provide a clean and finished appearance to the joint. The smooth, rounded head sits flush with the surface of the material, creating a neat and professional look. This makes carriage bolts suitable for applications where aesthetics is important, such as furniture assembly or architectural projects. Carriage bolts are also versatile and can be employed in various applications. They are extensively used in woodworking, construction, and assembly projects to fasten metal or wooden components together. Carriage bolts and nuts can be used together to create a secure and stable connection.