ThePipingMart Blog Fasteners Flange Bolt vs Hex Bolt – What’s the Difference

Flange Bolt vs Hex Bolt – What’s the Difference

Flange Bolt vs Hex Bolt

Knowing the difference between a flange bolt and a hex bolt is essential, as they have some distinct differences in their structure and application. While similar, there are certain situations where one type of bolt will work better than the other. Let’s explore both types of bolts and compare them to see which one will be best for your project.

What is Flange Bolt?

Flange bolts are high-strength bolts that are used to secure two heavy materials together. They have a cylindrical head and an angled ‘flange’ below it, making them ideal for use in applications without much space. The flange makes them self-locking, meaning you don’t need additional nuts or washers when securing the bolt into place.

What is Hex Bolt?

Hex bolts are very common fasteners that come with six sides on their heads. They are used to join two materials together more securely than a regular screw or nail can achieve, usually in places with limited access, such as underneath machinery or inside tight spaces. Unlike flange bolts, hex bolts require additional nuts to secure the material being joined together – this is called double nutting – but this also means they can be easily removed if needed.

Difference Between Flange Bolt and Hex Bolt

So which type of bolt should you use? It all depends on what kind of project you’re working on and what type of space you have available. If you have limited access, flange bolts will perform better than hex bolts because they don’t require additional nuts or washers for installation – screw them into place and tighten them! Conversely, if you have plenty of space available, then hex bolts may be the better option because they provide more security with double nutting. Also, their design makes hex bolts much easier to replace when needed.

  • Flange bolts are bolts with a flat base and a flanged head.
  • Hex bolts are bolts with a hexagonal head.
  • Flange bolts are typically used in applications where the bolt needs to be flush with the surface, such as automotive applications.
  • Hex bolts are typically used in applications where the bolt does not need to be flush with the surface, such as in construction applications.
  • Flange bolts are typically made from carbon steel, while hex bolts can be made from various materials, including carbon steel, stainless steel, and brass.
  • Flange bolts typically have a higher load-bearing capacity than hex bolts.


In conclusion, flange and hex bolts each serve different purposes depending on your needs. If you need something that’s quick and easy to install with limited access, then a flange bolt will work best; but if you need something that provides extra security with plenty of space available, then a hex bolt would be ideal for the job. Ultimately it’s up to you to decide which type of bolt works best for your project – do your research beforehand!

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