According to one estimate, the bolt market size is projected to reach USD 42.65 billion by 2030.

This suggests that bolts are critically important owing to how integral they are to many kinds of construction. A variety of other engineering projects also rely on bolts. When you’re choosing a bolt for one of these applications, you need to be able to make an informed choice.

Perhaps the most important element of this choice is the bolt head. A knowledgeable engineer will select bolts of the correct size for the job. They will also choose bolts with the correct type of bolt head.

Here, we discuss different types of bolt heads and what features distinguish them from one another. Dive in to learn more!

Hex Head Bolts

One of the most commonly used bolt heads is the hex head. As the name suggests, these bolts have six sides and are often called “hex bolts” or “hex cap screws.”

They can be tightened with a standard wrench or socket and are ideal for heavy-duty applications. The large surface area of the hex head also allows for more torque to be applied, making them a reliable choice for construction projects that require high levels of strength.

Square Head Bolts

Like hex head bolts, square head bolts have large surface areas and can handle heavy loads. The main difference is the shape of the bolt head; instead of six sides, square-head bolts have four equal sides.

They are commonly used in woodworking and timber construction, as they provide a strong hold and prevent the bolt from turning when being tightened. If you want to know more about this type of bolt head, a webpage with square head bolts can be a great resource. This webpage provides detailed information about the specifications and uses of square head bolts for various projects.

Flange Head Bolts

Flange head bolts, also known as frame bolts, have a wide circular flange under the bolt head. This flange acts as an integrated washer, providing a larger surface area for distributing weight and reducing the chance of the bolt becoming loose over time. Flange head bolts are commonly used in automotive and vehicle assembly, as well as in plumbing and electrical applications.

Round Head Bolts

These types of industrial bolts have a semi-circular shape and are often used for aesthetic purposes. They are commonly found in furniture construction and decorative hardware, where appearance is just as important as functionality. These bolts are not suitable for heavy-duty applications, but they can provide a smooth finish to your project.

Socket Head Bolts

These types of bolts have a cylindrical shape with a hexagonal socket at the top for tightening with an Allen wrench. They are often used in machinery and equipment assembly, as well as in automotive applications. The small size of the socket allows for bolts to be placed in tight spaces, making them a popular choice for mechanical projects.

Exploring the Different Types of Bolt Heads

Knowing the different types of bolt heads for your project can greatly impact its functionality and appearance. Consider the type of project, load requirements, and aesthetic preferences when selecting the appropriate bolt head for your project.

And remember, always consult a professional if you are unsure about which type of bolt head to use for your specific application. With this guide, you can confidently choose the right bolt head for your next construction or DIY project.

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