K12 gearstick adaptor size?

Hi guys,

Well, I'm a very bored little man (or so the wife might tell me) but I'm thinking about making a custom gear knob out of wood just for something to do.

I imagine I'll want to put some sort of threaded insert or helicoil into it so I can screw it on. Does anyone know the correct size and pitch that I'll need? From pictures it looks maybe like an M10 x 1.25 or 1.5? I don't own a gauge sadly.


Edit: Question may be void as I've been informed the gear knob pulls up and off.
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