Potentiometers with flatted shafts take screw-set knobs instead of the push-on type that knurled shafts use, and that typically forces the pot's mounting to the bracket to dictate the position marker min/max from the knob.
These pot knobs are special because they can be printed with a custom rotation degree.
Snap fit to 6mm diameter knobs, black w/ white position mark and trim, comes in a pack of 4.
Note: these are for flatted shafts, without knurls. When viewed from the side, the shaft should look like an "L". See picture for detail.
Don't see the rotation you need? Contact me.