When it comes to Bolts used in various industries, the two terms that one commonly hears are hex bolts and flange bolts. But what are they, and what’s the difference between them? This blog post will look closely at hex and flange bolts and identify their differences. This article will help you decide which bolt type best suits your applications.

What is Hex Bolt?

A hex bolt, also known as a hex head cap screw, is a type of fastener that has a six-sided head and a threaded shaft. It is commonly used in various industries for construction, repair, and assembly. The hexagon shape of the head allows for better grip and torque when tightening or loosening the bolt. These bolts are available in various sizes and materials to suit different applications.

What is Flange Bolt?

A flange bolt is specifically designed to be used with a flange, an external or internal ridge used for strengthening and attaching two pieces. These bolts have a large, flat head and are typically used in high-pressure applications such as pipelines, oil rigs, and other industrial equipment. They are made from durable materials such as carbon steel or stainless steel to withstand intense pressure and provide secure connections between parts.

Difference Between Hex Bolt and Flange Bolt

Size:

One major difference between hex and flange bolts is their sizes. Hex bolts are usually small and range from half an inch to four inches in length. On the other hand, flange bolts are larger and range from half an inch to twenty-four inches in length. However, the two are usually almost the same in terms of diameter.

Material:

The materials used to make Hex bolts and flange bolts are different and are based on the purpose and function of the bolts. Hex bolts are made from carbon steel, stainless steel, and other alloys, whereas Flange bolts are made from forged carbon steel to provide greater tensile strength.

Shape and Structure:

Another significant difference between hex and flange bolts is their shape and structure. As the name suggests, a hex bolt has a hexagonal head with a washer underneath it. On the other hand, a flange bolt has a hexagonal head with a flat washer combined with a flange on the end of the shank.

Functionality:

When it comes to functionality, both hex bolts and flange bolts serve similar purposes. However, in applications where there is more vibration, a flange bolt is often preferred. The flange provides a larger surface area that helps to distribute the load, making it less likely for the bolt to loosen over time. Hex bolts are more commonly used in applications that do not require vibration resistance. They are also easier and quicker to install and can be tightened with a standard wrench.

Applications:

Hex bolts require a smooth surface, and a flange would be an unnecessary element. They are typically used in assembling engines, vehicles, and motorcycles. Flange bolts are commonly used in the automotive and construction industries, especially where there is repetitive and heavy vibration, as they ensure the load is distributed evenly.

Conclusion:

The above comparison makes it clear that although both hex and flange bolts can be used in similar applications, they have diversified uses. The decision of which bolt to use will ultimately depend on the application’s needs and factors such as size, material, and functionality. It is always best to consult a professional to determine the right type of bolt to use in your specific situation to minimize the chances of failure and damage.

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