What is the shaft diameter that they are going to fit on?

Jim



"Jonathan Goodish" wrote in message
...
I am in search of a source for replacement knobs for carb heat and cabin
air controls (defrost, cabin heat) for a Piper Cherokee. Mine have
cracked and fallen apart (or are close to it), and need to be replaced.

I search in some usual places for plastic parts, and can't find them.
Does anyone have any suggestions for a source?



Thanks,
JKG