L-Shape Cast Interior Joint Brackets
XADQ21 · XADQ31
High-rigidity ADC12 die-cast L-shape brackets designed for concealed interior corner joints in T-slot aluminum profile frames. Available in standard 2-hole (XADQ21) and reinforced 4-hole (XADQ31) versions. Compatible with EU 20–40 series and GB 30–40 series profiles.
Material
ADC12 Zinc Alloy
Part Codes
XADQ21 / XADQ31
Profile Compatibility
EU 20–40 · GB 30–40
Available Series
5 Standard Series
Product Variants
Two standard hole configurations are available for all series. Custom finishes available on request for orders ≥ 500 pcs.
XADQ21Standard2-Hole Version
Standard interior corner bracket with 2 mounting holes. Suitable for general structural joints in T-slot aluminum profile frames. Sandblasted / vibratory polishing finish.
XADQ31Reinforced4-Hole Reinforced Version
Reinforced version with 4 mounting holes (suffix "S" in table) for higher pull-out resistance and structural rigidity. Ideal for high-load or vibration-prone applications.
Part Number System
Full part numbers are composed of: Code + Series + M + Reinforced
Series designation encodes slot width and profile dimensions. Example: 308 = EU 30 mm profile, Slot 8 mm. M value is the screw hole diameter. Reinforced suffix: – for standard (2-hole), S for reinforced (4-hole).
Dimensions & Series Compatibility
All dimensions in millimeters (mm). "–" = standard version (XADQ21, 2 holes); "S" = reinforced version (XADQ31, 4 holes).
L-Shape Cast Interior Joint Brackets — All Series
| Code | Series | M | Reinforced | A | B | C | C1 | E | T | W | W1 | No. of Holes | Compatible Profile |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XADQ21 XADQ31 | 206 | 5 | — | 30 | 30 | 20 | — | 20 | 5 | 6 | 10 | 2 | EU 20 Slot 6mm |
| 206 | 5 | S | 30 | 30 | 15 | 10 | 15 | 5 | 6 | 10 | 4 | ||
| G306 | 5 | S | 30 | 30 | 15 | 10 | 15 | 9 | 6 | 10 | 4 | GB 30 Slot 6mm | |
| 308 | 6 | — | 31 | 38 | 25 | — | 22 | 7.5 | 8 | 14.5 | 2 | EU 30 Slot 8mm | |
| 308 | 6 | S | 40 | 45 | 25 | 13 | 20 | 7.5 | 8 | 14.5 | 4 | ||
| G408 | 6 | — | 40 | 44 | 27 | 10 | 23 | 10 | 8 | 12.5 | 4 | GB 40 Slot 8mm | |
| 408 | 6 | — | 31 | 38 | 25 | — | 22 | 8 | 8 | 18 | 2 | EU 40 Slot 8mm | |
| 408 | 6 | S | 40 | 45 | 25 | 13 | 20 | 8 | 8 | 18 | 4 | ||
| 4010 | 8 | — | 31 | 38 | 25 | — | 22 | 8 | 10 | 18.5 | 2 | EU 40 Slot 10mm | |
| 4010 | 8 | S | 40 | 45 | 25 | 13 | 20 | 8 | 10 | 18.5 | 4 |
Key Features
High-Rigidity ADC12 Die-Cast
Precision die-cast from ADC12 zinc alloy for consistent dimensional accuracy, high surface quality, and excellent load-bearing performance.
Standard & Reinforced Versions
XADQ21 (2-hole standard) for general use; XADQ31 (4-hole reinforced) for higher pull-out resistance in demanding structural applications.
Wide Profile Compatibility
Compatible with EU 20-40 mm and GB 30-40 mm T-slot series, covering the most common industrial aluminum profile standards worldwide.
Concealed Interior Joint
L-shape geometry fits flush inside the profile corner, providing a clean, concealed joint without protruding hardware on the exterior.
Precision 90° Geometry
Die-casting process ensures consistent 90° angle tolerance across all production batches, critical for frame squareness and assembly repeatability.
OEM & Custom Options
Custom hole patterns, dimensions, and surface finishes available for orders of 500 pcs or more. Contact our engineering team for details.
Typical Applications
Machine Frame Corners
Reinforce interior corner joints of aluminum profile machine frames and equipment enclosures for improved structural rigidity.
Automation Cell Structures
Strengthen interior joints in conveyor frames, robotic cell enclosures, and automated equipment structures requiring concealed hardware.
Workstation & Rack Frames
Add concealed interior corner support to modular workbenches, server rack frames, and ergonomic workstation structures.
Frequently Asked Questions
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