What are flange bolts? And what are they used for?

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Flange bolts or flange fasteners are fasteners with a washer or a nut used to fasten parts together with flanges or ribs. These fasteners are designed to spread the load across the flange and ensure that the joint doesn’t come undone. There are several applications where these fasteners can be used.

In this blog, we shall discuss flange bolts and how they are commonly used in various applications. We will also touch upon tips for selecting the right type of flange bolt for your project, so you can make an informed decision while purchasing them from your vendor.

What are the flange bolts?

Flange bolts are small-diameter bolts used in steel and corrosion-resistant materials. They are typically used to connect two components in a fixed position, such as in a flange or a head, but they also can be employed for other purposes. Common uses include securing washers or shims to an axle, securing bearing races to crankshaft journals, and holding threaded fasteners in place on a housing.

A flange bolt is similar to the nut, except it is larger in diameter to accommodate a washer or other washer types. It has a head with a retainer ring and a hexagonal head that connects to the washer or washer type using a hexagonal socket. The washer sits inside the socket and is tightened against its surface with a wrench or socket wrench. A flange bolt is inexpensive to secure washers or shims between two components, but they should only be used when necessary. They can damage a component due to the washer’s weight and the torque applied by the wrench.

A washer is another option for securing washers between two components instead of using a flange bolt. As with flange bolts, washers should only be used when necessary and not as the primary means of securing washers or shims.

What are flange bolts used for?

Flange bolts are used for applications with more surface area for the nut to be tightened. They are generally used in automotive and construction applications, where vibration or movement is an issue. Flange bolts provide additional structural integrity and can help reduce the risk of leaks. They can also secure metal components and provide extra stability when working with heavy loads. Aside from their use as fasteners, flange bolts are also used as gaskets or packing material for sealable applications.

The main feature of flange bolts is their sealability, which helps prevent leakage. Their size also makes them versatile, making them suitable for various applications. Their corrosion resistance and strength make them easy to handle, allowing you to assemble them quickly and make your projects go smoothly. Flange bolts have many benefits, making them a great choice for any application.

What are the common types of flange bolts?

Flange bolts are fastener types used in steel structures and machinery applications. They are designed for heavy-duty applications and have a variety of uses, from holding together steel pieces for structural connections to securing fastener nuts or washers on a bolt.

Socket head flange bolts have an internal hex drive, making them easy to install in tight spaces. This flange bolt type is popular for machines and construction projects because it’s easy to use and easily removed.

Hex-head flange bolts feature a six-sided head and are commonly used for machinery and construction projects. These bolts are easier to handle than their counterparts due to their lighter weight and smaller size. Slotted head flange bolts are suitable for low-torque applications and are easier to remove due to their slotted head design.

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Our company’s capability to manufacture flange bolts

Flange bolts are the fastener used in flange or tapered connection applications. It is a type of bolt used to secure a fastener or part that provides high strength and durability. They manufacture flange washers, lock washers, and wing nuts.

Xfasteners offer high-security flange bolts compared to other fasteners. The advantages of using flange bolts include their versatility, ease of use, and ability to withstand high torque and pressure.

Frequently Asked Questions

What types of materials are flange bolts made from?

Flange bolts are fastening hardware that features a washer-like flange at one end of the bolt. These bolts lock two parts together and provide additional strength to the connection.

When it comes to the material that flange bolts are made from, steel is the most common option for general-purpose applications. However, stainless steel flange bolts should be used instead if rust or corrosion resistance is required. Other materials which can be used for flange bolts include brass and aluminum. While these materials have lower strength than steel or stainless steel, they are lightweight and ideal for electrical applications.

Are there any safety considerations when using flange bolts?

Yes, there are important safety considerations to keep in mind when using flange bolts. Flange bolts provide a secure connection between two surfaces without additional washers or nuts. It is important to ensure that you select the correct size and thread pitch for your application. Additionally, it is important not to over-tighten the flange bolt as this can damage the flange bolt itself or the material it is using.

Finally, it is recommended to use anti-seize lubricant when installing flange bolts to prevent corrosion and ensure proper torque levels. Following these safety considerations will help ensure a secure connection while protecting the integrity of both your flange bolt and the materials it’s used on.

What are some common applications for flange bolts?

Flange bolts are incredibly versatile fasteners, making them a great choice for various applications.

From automotive and machinery to construction and electronics, flange bolts can securely join two pieces together in whatever application you need. For example, they can attach a wheel to a car’s axle or assemble frames and other parts of industrial machinery.

Flange bolts can also be used in plumbing and electrical applications and for mounting signage or artwork. Because flange bolts are usually designed with countersunk heads that provide greater surface area contact, they offer better stability than other fastening solutions like machine screws or hex head bolts.

In short, flange bolts are an incredibly useful fastener that can help make your various projects easier, more efficient, and more reliable.

How does a flange bolt differ from a standard bolt?

A flange bolt is a type of fastener with a wide flange at one end, designed to distribute the load more evenly over the fastened surface. This flange helps increase the torque applied when tightening the bolts and prevents any damage or wear on the fastening material.

The head of a flange bolt is also larger than that of a standard bolt, which helps to prevent it from slipping through the hole in the material. This makes them ideal for fastening two materials together that require additional support and stability.

Flange bolts are commonly used in applications such as engine blocks, pumps, valves, and other heavy machinery that need extra support due to their size and weight.


Flange bolts are an efficient way of fastening objects together. They offer a more secure connection than regular nails or screws because they form a tight, interlocking connection. The flange provides a flat surface to which you can apply pressure when tightening the bolt. Using flange bolts, you can ensure that two pieces of material will not shift or separate over time and that your project will last longer. Contact us today if you’re looking for high-quality flange bolts for your next project!