I designed this to stack my Prusa Lack Enclosure v2 (https://blog.prusaprinters.org/mmu2s-printer-enclosure/) on a third Lack table.

It uses these screws (https://www.amazon.com/gp/product/B07M5SRLTF)
I originally purchased them for the Lack Enclosure but the heads ended up being to big and I had to buy some #10 x 3/4" Sheet Metal Screws from Menards.