This is a three-way (corner) connector for 2020 extrusion. Bottom thickness is 5mm, so deduct that from the "vertical" extrusion.
Uses four, M4 set/grub screws. Holes sized for tapping.
Rafts:
Doesn't Matter
Supports:
Yes
Category: HobbyThe author marked this model as their own original creation. Imported from Thingiverse.