The file 'Corner Brackets For 2020 Aluminum Extrusion Brace 3D Printer Model' is (stl) file type, size is 212.6KB.
Corner Bracket for 2020 T-Slot Aluminum Extrusion
Tapped the 5mm center hole with an M6 thread and used M6x30mm allen key bolts.
Some 2020 extrusions have a ~4.2mm hole diameter. In that case you might want to use this design, of which I basically based my version on: https://www.thingiverse.com/thing:2410086
2020_brace_M4_M6_V2.0.stl | 281.5KB | |
2020_brace_M4_M6_V2.0_1mm-fillet.stl | 278.2KB |