This is a 3D printer friendly take on the playwood sheet material joiner - 90deg.

This is to be used with DIN standard M8 square nut (I used stainless), and a matching material countersunk hex socket M8 screw. I've put some links below.

I would recommend printing with at least 30% geodesic infill in ABS for longevity. 100% makes it incredibly strong.

It should be printed on its side to maximise the strength.

At some point I will be designing and uploading some other angles.

Happy printing

Screw:
https://www.amazon.de/gp/product/B07BST5D29/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Nut:
https://www.amazon.de/dp/B07C6VT6XN/ref=cm_sw_r_cp_api_i_GTtGDbF2JR98W