8 Pack Inside Corner Brackets Gusset 77x77x40mm 4080 Angle Connectors For 4040 4080 Aluminum Extrusion Profiles Silver Heavy Duty DIY Frame Building Kit

8-Pack Aluminum Corner Brackets for 4080 Profiles ✔️ 8 brackets per pack, 77x77x40mm, 4 holes (8mm dia + 25x8.5mm slots)

These heavy-duty corner brackets are designed to join 4080 aluminum extrusion profiles at right angles, forming solid DIY frames, machine enclosures, or robotics chassis. They fit 4080/4040 profiles and provide a durable, rust-resistant connection with a sandblasted finish for longevity. Each bracket measures 77mm long, 77mm high, and 40mm wide (3.03" x 3.03" x 1.57").

✅ Pack: 8 brackets per package for 4080 profiles
✅ Size: 77mm long x 77mm high x 40mm wide (3.03" x 3.03" x 1.57")
✅ Material: aluminum die-cast with sandblasted finish for rust resistance
✅ Holes: four holes, two 8mm dia and two 25x8.5mm slots
✅ Application: fits 4080 series profiles for right-angle frame builds

💡 What is a corner bracket used for in aluminum extrusion projects?

These handy brackets lock two profiles at a precise 90-degree angle, creating strong, rigid frames for machinery, enclosures, and DIY builds.

- suitable for 4080 and 4040 extrusion systems
- improves joint rigidity for CNC machines and 3D printers
- easy to install with standard bolts, nuts, and washers (not included)