Product Details
90° Corner L-Plate for 30 Series Aluminum Extrusion — Black
The 90° corner L-plate is a black 30 Series aluminum extrusion connector designed for joining compatible extrusion profiles at a right angle. With a 90 mm × 90 mm size, 4 mm thickness, and 5-hole bracket design, this L-plate is a practical hardware component for frame assemblies, machine bases, enclosures, fixtures, guards, stands, and custom extrusion projects.
90° Corner L-Plate for 30 Series Frames
This 90° corner L-plate is designed for compatible 30 Series aluminum extrusion systems. It helps create strong right-angle connections between extrusion profiles, making it useful for square frames, support structures, equipment mounts, enclosure frames, and modular hardware assemblies.
Black Powder Coated Finish
The live product page lists this bracket with a black high-gloss powder coated finish. The black finish gives the bracket a clean appearance for visible frame assemblies, display structures, equipment builds, and custom projects where the hardware remains exposed.
5-Hole Bracket Design
The 5-hole layout provides multiple fastening points for compatible mounting hardware. This helps secure the bracket across the corner joint and supports a cleaner, more stable connection when the frame is properly aligned and tightened.
Required M6 Hardware Sold Separately
This 90° corner L-plate requires compatible M6 socket head cap screws and M6 T-nuts for installation. The required fasteners are sold separately, so confirm your extrusion slot, screw length, and T-nut style before ordering.
Common Uses
- 30 Series aluminum extrusion frames
- Machine bases and equipment supports
- Enclosure and guard frames
- Workbench fixtures and shop jigs
- 3D printer or CNC-style frame assemblies
- Custom modular hardware projects
Related Aluminum Extrusion Hardware
Browse more aluminum extrusion parts, hardware components, and fasteners for frame assemblies, equipment builds, and custom hardware projects.
Helpful Reference
For general background on modular aluminum framing systems and connection hardware, see this overview of aluminum extrusion frame design considerations.
Sold Individually
Each 90° corner L-plate is sold individually. M6 socket head cap screws and M6 T-nuts are required for installation and are sold separately.

Specifications
| Product Type |
90° aluminum extrusion corner L-plate |
| Extrusion Compatibility |
Compatible 30 Series aluminum extrusion |
| Angle |
90° |
| Dimensions |
90 mm × 90 mm |
| Thickness |
4 mm |
| Bracket Design |
5-hole L-plate |
| Finish |
Black high-gloss powder coated finish |
| Required Hardware |
M6 socket head cap screws and M6 T-nuts, sold separately |
| Common Applications |
30 Series extrusion frames, machine bases, enclosure frames, equipment supports, fixtures, 3D printer frames, CNC-style frames, and custom hardware assemblies |
| Quantity |
Sold individually |
| SKU |
DB-0550-6728 |
Verification note: Exact material grade, hole diameter, hole spacing, load rating, included hardware, and manufacturer are not listed on the current product page and should be verified before adding.
Shipping & Returns
Shipping & Turnaround Times
At dnb3D, we don’t just ship boxes—we manufacture solutions. Operating our Industry 4.0 micro-factory in Marathon, Ontario, means your order is handled by the same people who design and test these components.
-
Ready to Ship (3D Printer Parts & Hardware): Finished, inspected, and on the shelf. Dispatched within 1 to 2 business days.
-
In-House Manufacturing (Laser, Plasma, 3D Prints): These items are manufactured “fresh” to order. Please allow 3 to 5 business days for precision cutting and finishing.
-
Custom Projects: Bespoke designs require a consultation and a locked-in timeline before production begins.
National Shipping Reach
We ship nationwide across Canada and the USA. Centrally located on the North Shore of Lake Superior, we are uniquely positioned to get your products moving quickly to either coast.
30-Day Craftsmanship Guarantee
We stand behind every weld, cut, and print. If a product doesn’t meet your expectations, contact the Hub within 30 days. If we wouldn’t put it in our own shop, we won’t let it sit in yours.
Returns & Personalization
-
Standard Items: Contact us within 30 days for return authorization. Items must be in original, unused condition.
-
Custom/Personalized Orders: Digitally fabricated to your exact specs (names, custom dimensions, or unique finishes) are final sale once production begins.
-
Shipping Costs: Return shipping is the responsibility of the customer unless the item arrived damaged or defective.
Have questions about a specific build? Click here to contact the shop.