Fits our metric sized knobs.
1 nut and 1 washer.

Push / Push Control Potentiometer
500K, B type
B type : Linear taper

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You can switch the wiring by just pushing instead of pinching a knob to prevent an error like volume-tone selection.
No need to pinch a knob on switching, so you can even use hard-to-grip knobs like bell, hat or sombrero.
You can switch the wiring while holding a pick.
“When pushed down, the Selector interacts with the bottom 4 lugs (B-C-E-F).”
B connects to C
E connects to F
“When pushed (again) to pop up, so it does with the top 4 lugs (A-B-D-E).”
B connects to A
E connects to D.
As you can see, B and E stay connected.
As four variations (250K A type, 250K B type, 500K A type and 500K B type) are available, you can connect and wire any pickups.
A type : Audio taper
B type : Linear taper


Do remove knobs while the shaft is “UP”.
Removing knobs while it’s “DOWN” might cause a damage.