EGT tap and dye size???

[DSMafia]

Ok i have a TRE egt probe and am having a hell of a time finding the tap and dye size for it. I measured the threads and it said 27 count.... weird as hell....anyways im hoping someone knows the size so i can go buy the dam nthing and get it ove with....

 

[ATF 2GTalon]

It should be a 1/8" NPT. You should be able to look up the drill size for that.