1/2 Inch Hex Nut Knob

It's easier for me to get 1/2" threaded rods then M12 rods, so I modified the Nut knob for a 1/2" hole and shorted it up to better fix a standard 1/2" hex nut.

Hex Nut I used;
https://www.homedepot.com/p/Everbilt-1-2-in-Zinc-Plated-Coarse-Threaded-Hex-Nut-804716/204647892