OpenBuilds black 90° angle corner connector for 20mm V-Slot and T-slot frames. Milled aluminum corner hardware for squaring and reinforcing extrusion joints on CNC, laser, and 3D-printer frame builds. Why use this connector 90° frame joints: made for attaching accessories or joining extrusion at a right angle. 20mm extrusion fit: documented for 20mm V-Slot or T-slot profile systems. Black anodized aluminum: a compact metal bracket that blends into black OpenBuilds-style frames. Dual-use geometry: commonly used as a corner connector and, where the build calls for it, an adjustable wheel block. Specifications Part: OpenBuilds Black Angle Corner Connector Angle: 90° Material/finish: milled aluminum, black anodized Extrusion compatibility: 20mm V-Slot / T-slot profile systems Typical mounting hardware: M5 × 8mm low-profile screws with M5 T-nuts; hardware is not included unless your order explicitly says otherwise. Fitment and pairings Use with 2020 extrusion for small machine frames, fixtures, enclosures, and accessory mounts. Pair with Hammerhead T-Nuts for 20 Series Aluminium Extrusion when you need drop-in fastening on a 20-series slot. Gotchas This is a single connector, not a multi-pack. This is for 20mm-series extrusion systems; do not buy it for 15-series MakerBeam or 30-series extrusion unless your build documentation specifically calls it out. It does not replace a full structural plate where your design needs high-rigidity gantry or load-bearing reinforcement. “They've got decent heft.” — verified buyer
