View Full Version : 1/8" NPT
DSMWHAT
09-03-2004, 08:29 PM
What size drill bit do I need? 1/4" ? I need to tap my EGT.
Mirage
09-03-2004, 08:46 PM
The Correct size drill bit is size "R".
The closest fractional drill bit to use is I believe is 21/64"
Marcus Martinez
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