Adafruit Adjustable Angle Support for 2020 Aluminum Extrusion
The half that connects to the side one an extrusion simply uses a single M4 or M5 x 8mm long screw + T-nut as you'd use with any other plate. For the half that connects to the end of an extrusion, you'll need to tap the 5mm diameter center-hole of the extrusion and screw directly in. We don't include a tap or matching screw so you'll want to pick those up from a hardware store.
Adjustable Angle Support for 2020 Aluminum Extrusion (15:07)