M12 5 sided Fidget Spinner - Hex Nut

thingiverse

Print with a brim if you don't have a sticky bed - it helps keep the ends down. This part takes an 18mm wide M12 nex nut that's 10.55mm deep. The center bearing is a standard 608ZZ hole. The center hole measures 22.1mm for a nice press fit. Hex nut holes are 18.3mm, which requires a tight press fit - you might need to use a vice. Since nuts are wider than the spinner, they must be centered depth-wise.