Central Connectors
S45C carbon steel anchor-style connectors for invisible internal profile-to-profile joining. Inserted through the profile end face and tightened with a hex key. Available in 0 degree (inline) and 90 degree (perpendicular) configurations. Compatible with EU 30 and EU 40 series profiles.
Material
S45C Carbon Steel
Part Code
XADF21
Profile Compatibility
EU 30 Slot 8mm / EU 40 Slot 10mm
Available Angles
0 deg (Inline) / 90 deg (Perpendicular)
Surface Finish
Standard zinc plating provides corrosion protection for indoor industrial environments.
XADF21Zinc PlatedElectroplated Zinc Coating
Bright zinc electroplating provides uniform corrosion resistance and a clean silver appearance. Suitable for general indoor industrial environments. RoHS compliant.
Dimensions & Series Compatibility
All dimensions in millimeters (mm).
Part Number System
Code
Product family identifier (XADF21)
Series
Profile series (e.g. 308, 4010)
Angle
Joint angle: 0 (inline) or 90 (perpendicular)
| Code | Series | Angle | A (mm) | B (mm) | C (mm) | D (mm) | D1 (mm) | E (mm) | Compatible Profile |
|---|---|---|---|---|---|---|---|---|---|
| XADF21 | 308 | 0 deg | 18 | 20 | 15 | 11 | 6.5 | 8 | EU 30 Slot 8mm / EU 40 Slot 8mm |
| 308 | 90 deg | 18 | 20 | 15 | 11 | 6.5 | 8 | ||
| 4010 | 0 deg | 25.5 | 28 | 19 | 17 | 9.6 | 10 | EU 40 Slot 10mm | |
| 4010 | 90 deg | 25.5 | 28 | 19 | 17 | 9.6 | 10 |
Key Features
Engineering advantages that make XADF21 the preferred choice for concealed connections.
Fully Concealed Joint
Entire connector sits inside the profile bore - no visible hardware on the exterior surface.
Dual Angle Variants
0 deg inline and 90 deg perpendicular configurations available under the same product code.
High-Strength S45C Steel
Carbon steel body delivers superior tensile strength compared to zinc die-cast alternatives.
Hex Key Installation
Tightened via hex key through the T-slot - no drilling, welding, or adhesives required.
EU 30 & EU 40 Compatible
Covers the two most common EU-standard profile series in a single product family.
OEM & Custom Options
Custom requests require drawings, quantities, and source confirmation.
Typical Applications
Where clean, invisible joints are required in professional aluminum profile assemblies.
Automation & Machine Frames
Invisible joints for precision machine frames where aesthetics and cleanliness matter.
Display & Exhibition Frames
Seamless appearance for trade show and retail displays.
Frame Extensions
Extending conveyor and machine frames end-to-end with no protruding hardware.
Furniture & Workstations
Invisible joints for professional-grade aluminum furniture.
Lab & Clean Room Structures
No external hardware means easier cleaning and compliance with hygiene standards.
Modular Enclosures
Concealed connections for enclosures and housings requiring a finished appearance.
Technical FAQ
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