1 Alpha 250K audio (log) potentiometer, 6 mm solid shaft, 8 mm metric thread
Solid shaft: length 7 mm, diameter 6 mm,
Metric thread, length 10 mm
Made in Korea by Alpha
Audio or linear: which one should you choose?
An audio (logarithmic) potentiometer follows the way your ear perceives volume: the rise is gradual over the entire rotation of the knob. It is the original choice on electric guitars for volume, and the most common one for tone.
A linear potentiometer changes at a steady rate. On volume, the sound barely drops over most of the rotation, then falls off sharply at the end. On tone, some guitarists like it for its more spread-out action.