Special M10x0,75mm Potentiometer Nut
These are special potentiometer nuts which have a smaller diameter like they're used on recording consoles.
These nuts work better if you want to use small knobs.
M10x0,75mm threads (check the datasheet of the potentiometers you're using if that's the right thread) full metal part
Thickness: 2,5mm
Outside Diameter: 13,5mm