Help identify this 10K potentiometer?
It is a potentiometer with a center tap output on the extra pin, like this one:

https://www.mouser.com/datasheet/2/15/RK11K11_VARIETYOTHER-253030.pdf

"5F2" most likely refers to the package options like shaft length and if the detent is present or not, but you'd need a datasheet from the original manufacturer to be certain.

I think you'll have to remove the existing one and use a multimeter to determine the pin assignments (for wiper, center tap) in order to find a suitable replacement from another manufacturer, like the Alps part I linked to.