threading details for gear shift handle?

i am wanting to modify a billiard ball to swap onto the gear shift handle for 2013 V6 manual transmission Tacoma.

Anyone know off the top of their head what the threading details are to properly mate?

I have tried a 1/2" nut coarse and a metric 12 nut coarse, these are close but do not work.
and, visually, it seems the thread count on the shift handle is not quite standard "fine" either (though I have not tried a fine in either size yet)...

any pearls of wisdom would be greatly appreciated by this Tacoma newbie!!!!!

 

Hah! We meet again. Thread pitch is 12mm X 1.25- aka fine metric

 

sah-weeeeet ... thanks for the confirmation!!!

(apparently, common for spark plug taps?)
got one ordered...

Vermont American 21146 12MM-1.25 High Carbon Steel Metric Spark Plug Tap

http://www.amazon.com/gp/product/B000K1LZVM/ref=oh_details_o00_s00_i01?ie=UTF8&psc=1
soon, will have a variety of shifter handle options depending on mood/season... cool !!!!!

@WHPLSH3 ... thanks again!!!