4-Pack Heavy-Duty 4040 3-Way Corner Brackets for 8mm T-Slot
✔️ Includes 4 brackets, M6 screws, and Allen key for 8mm slots

This 4-pack set features 4040 series 3-way end corner brackets made from zinc alloy, designed to connect 8mm slot T-slot aluminum extrusion profiles quickly and securely. They’re ideal for building sturdy, hidden joints in modular frames used in 3D printers, CNC routers, robotics, and industrial enclosures.

✅ Dimensions: 74x74x44 mm (2.9x2.9x1.7 in) LxWxH
✅ Material: zinc alloy with black finish for rust resistance
✅ Fit: 8mm slot aluminum extrusion 4040 series
✅ 3-sided end corner bracket with concealed fit
✅ Pack includes 4 brackets, 32 screws, 1 Allen key
✅ Simple installation: insert into butt joint pocket and tighten with set screws

💡 What is a common use for corner brackets in aluminum extrusion frames?

Corner brackets are handy for creating rigid corners in modular frames, especially with 8mm slot extrusions used in DIY projects like 3D printers and CNC machines. - Handy for making strong corners on 4040 profiles in DIY builds
- Keeps frames square under load in machines and guards
- Quick to assemble or reconfigure in modular systems
- Works with standard 8mm bolts and M6 screws in extrusion joints