TSLOTS by Bonnell Aluminum  are the leading T-slotted aluminum extrusions manufactured, distributed and sold by an aluminum extruder. That means you get the most consistent quality and one of the most extensive offerings in the industry. You never have to worry about color or finish, because all TSLOTS meet the same extremely high standards.



We’ve designed TSLOTS to help you quickly and easily create anything from clean rooms to robot enclosures. You simply insert a T-nut and fastener into TSLOTS and tighten. All you need are a few simple hand tools to create a durable, strong, lightweight structure that’s both functional and attractive.

Our helpful and supportive staff is here to assist you with everything from design to delivery. High-strength TSLOTS are maintenance free, with a clear anodized finish that’s resistant to scratches and corrosion and never needs painting.

We offer a wide variety of extruded aluminum to fit just about any project. Take a look at the following list to find the right products for your project.


The TSLOTS Metric Series blends the look and functionality of fractional TSLOTS with the convenience of metric dimensions that create compatibility with European framing systems. We have a wide range of components and fasteners that fit the Metric Series.

Browse our Metric Products


The Fractional TSLOTS Series is a great fit for both small to large guarding, machine frames and bases, along with table and shelving applications. TSLOTS in the 10 Series are modular and have .255-inch slot width while the popular 15 Series has .322” slot width. Our accessories allow you to build a complete structure within each series and transition to and from other series as you see fit.

Browse our Fractional Products


The 15 extrusions in the TSLOTS B-Series are fully compatible with Bosch extrusions and feature slot widths ranging from 6mm to 10mm. The B-Series integrates some unique fastening methods — while also overlapping with the fastening methods and components in our TSLOTS Fractional line.

Browse our B-Series Products