What is the difference between 2020 and 8020 aluminium extrusion?
Anyone working with modular framing systems will eventually come across the terms 2020 and 8020 aluminium extrusion, and the two are often confused or used interchangeably. Although they share a similar naming convention, they are not the same thing, and understanding the distinction can save time, budget and frustration when specifying a project. As a supplier of aluminium extrusions to a wide range of industries, we are often asked to explain the difference, so we have put together this guide to clear up the confusion.
What does 2020 aluminium extrusion mean
The number 2020 refers to a profile size rather than a brand. It describes an extrusion with a cross section measuring 20mm by 20mm, and the T slot design allows accessories, brackets and fasteners to slide into the channels along each face. This makes it a popular choice for lightweight frames, enclosures, workstations and small machine guards, since the profile is compact and easy to work with. Engineers and designers favour 2020 extrusion when a project calls for a slim, modular structure that still offers enough rigidity for light duty applications.
Because the numbering system describes dimensions, you may also come across 2040, 4040 or 2080 extrusion, all of which follow the same logic but with different cross sectional sizes. So 2020 sits at the smaller end of this range, which is why it tends to suit compact builds rather than heavy industrial frameworks.
What does 8020 aluminium extrusion mean
Unlike 2020, the term 8020 does not describe a profile dimension at all. It is in fact a registered trademark, originally belonging to an American company that manufactures T slot aluminium framing systems under that exact brand name. Consequently, when someone refers to 8020 extrusion, they are usually referring to a specific manufacturer’s product line rather than a generic size or shape.
This distinction matters a great deal when specifying materials for a project. A designer asking for 8020 extrusion may, in fact, mean any T slot profile in the style that the 8020 brand popularised, and confusing the trademarked name with a generic sizing term can lead to delays, incorrect ordering or unnecessary costs if the branded product is not required.
How the two terms are often confused
Because 8020 became such a widely recognised name within the modular framing world, many people now use it loosely to describe any T slot aluminium extrusion, regardless of the manufacturer. This is similar to how some brand names become synonymous with an entire product category over time. As a result, buyers sometimes ask for 8020 extrusion when what they actually need is a generic profile of a comparable size, such as 2020 or 4040.
For anyone sourcing extrusions for a new build, it helps to think in terms of the actual dimensions and specification required, rather than relying on brand terminology. This ensures the right profile is selected for the application, and it also opens up a wider range of suppliers and options, since generic profiles are widely available and often more cost-effective than branded alternatives.
Which option suits your project
Choosing between a generic 2020 style profile and a specific branded system depends entirely on the requirements of the build. If compatibility with existing branded components is essential, then sourcing the correct trademarked product becomes important. However, if the project simply calls for a T slot profile of a particular size, a generic extrusion can often achieve the same functional outcome, and typically at a more competitive price point.
We would always recommend reviewing the load requirements, assembly method and any existing framework components before finalising a specification. So taking the time to clarify these details early on avoids costly reordering further down the line. Our team can talk through the practicalities of your design and help match the correct extrusion profile to your application, whether that means a lightweight 2020 style section or something more substantial.
For further technical background on T slot extrusion standards, the National Institute of Standards and Technology publishes useful reference material on aluminium alloy specifications, which can be found here.
Sourcing aluminium extrusion for your business
We work with clients across a broad range of sectors, from lighting and signage through to automotive and manufacturing, supplying extrusion profiles tailored to each project. If you are weighing up the difference between 2020 and 8020 style extrusion, or you simply need guidance on which profile suits your application, our team is on hand to help. You can find out more about the sizes and finishes we supply on our aluminium extrusions page.
We understand that every project comes with its own set of requirements, so we take the time to talk through specifications before recommending a solution. This approach means you get a profile that genuinely fits your build, rather than a generic recommendation based on guesswork.
Contact Us Today
If you would like to discuss your aluminium extrusion requirements, our team is ready to help. We can advise on profile sizes, finishes and fabrication options to suit your project, and we aim to respond quickly to every enquiry. Get in touch with us today to talk through your specification, request a quote, or simply ask a question about which extrusion profile is right for you.
