Black 4-Hole L-Shaped Connecting Plate for 2020 Aluminum Profile - Structural Joint

Specifications

• Material: 6063-T5 Milled Aluminum

• Finish: Premium Black Anodised

• Plate Type: 4-Hole L-Shape (90° Joining Plate)

• Thickness: 2mm )

• Hole Diameter: 5.5mm (Clearance for M5 Fasteners)

• Hole Spacing: 20mm (Standard 2020 Pattern)

• Dimensions: ~60mm x 60mm

• Weight: 40g

Key Applications & Projects

• 3D Printer Outer Frames: Use on all eight corners of a cube frame for maximum structural rigidity.

• CNC Gantry Support: Reinforces the vertical-to-horizontal member connection to prevent gantry lean.

• Sim-Racing Rigs: High-torque connection for steering wheel and pedal deck supports.

• Industrial Workbench Bracing: Creates a clean, "hidden-screw" look for shelving and workstations when used with button head fasteners.

Unlock New Capabilities (Project Evolution)

• Past Projects: If you have used 2-hole internal corner brackets, you know they can slip if the screws aren't perfectly tight.

• Feature Upgrade: This 4-hole external plate locks the faces of the profiles together, making it physically impossible for the joint to pivot. It turns your frame into a "structurally bonded" unit rather than a collection of parts.

• Effort Level: Beginner. No drilling or tapping required; simply slide M5 T-nuts into the slots and bolt on.

Virtual Technician & Tips

• Probots™ Logic-Safe Alignment: For the most professional look, use M5x10mm Button Head screws. The low-profile heads sit perfectly on the plate and match the black anodized finish.

• Installation Tip: Loose-fit all four screws into the T-nuts first. Use a precision square to hold the joint at 90° before tightening the screws in a "criss-cross" pattern for perfectly even tension.

Included Accessories

• 1 x Black 4-Hole L-Shaped Connecting Plate (20-Type)

• (Note: M5 Screws and T-Nuts sold separately)

Frequently Asked Questions (FAQ)

1. Will this fit V-Slot profiles? Yes, it is fully compatible with both V-Slot and T-Slot 2020 series profiles.

2. Is it better than a 5-hole plate? A 4-hole plate is slightly more compact while still providing massive rigidity. It's often preferred for cleaner corner aesthetics.

3. Does it require drilling? No, it mounts externally using the existing slots in your profile.

4. What length of screw should I use? M5x10mm Button Head or Socket Head screws are recommended.

5. Is this made of plastic? No, it is solid milled aluminum.

6. Can I use this for 2040 profiles? Yes, it will fit on the 20mm face of a 2040 profile.

7. Is the black finish durable? Yes, it is anodized, which is a chemical surface treatment that is much harder than paint.

8. How many should I use per corner? One plate per corner is standard, but using one on each side (front and back) creates an incredibly rigid joint.

9. Will this fit 3030 profiles? No, this is for 20mm (2020/2040) series only.

10. Do I need special tools? Only a 3mm hex key for the M5 screws.

11. Is it magnetic? No, aluminum is non-magnetic.

12. What is the plate thickness? It is 2mm thick for structural integrity.

13. Can I use this to mount electronics? Yes, the extra holes are often used to mount small PCB brackets or sensors near the frame corners.

14. Will it rust outdoors? Aluminum forms a natural oxide layer and the anodizing provides extra protection, so it will not rust like steel.

15. What is the hole diameter? 5.5mm, providing a perfect clearance fit for M5 bolts.

16. Is this plate cast? No, it is milled from a solid sheet for better strength and cleaner edges.

17. Can I use M4 screws? You can, but M5 provides a much stronger and more secure connection.

18. Does it block the profile slot? Only the section directly under the plate is blocked; the rest of the slot remains open for accessories.

19. How do I ensure a perfect 90° angle? Always use a machinist’s square during the tightening process.

20. Does it come in other colors? Currently, we stock the premium Black Anodized version.