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EGT probe thread size

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Old Jun 11, 2007, 07:04 AM
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EGT probe thread size

I just recieved my Defi 1/8 NPT EGT fitting from Evasive and i want to drill and tap it myself. Wondering if anyone knew the drill/tap size neecessary.

IIRC, 1/8 NPT designates the threads but im still a little weary. Would it be ok to use a standard tapered 1/8-27NPT tap?

Last edited by Sap12687; Jun 11, 2007 at 07:22 AM.
Old Jun 11, 2007, 07:25 AM
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NPT Size Tap Drill Size (in.) Decimal Equivalent (in.)

1/8 - 27 "Q" 0.332
Old Jun 11, 2007, 07:40 AM
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btw a 11/32 drill bit will work too
Old Jun 11, 2007, 11:17 AM
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Originally Posted by SlowCar
NPT Size Tap Drill Size (in.) Decimal Equivalent (in.)

1/8 - 27 "Q" 0.332

Should i be able to pick this up at a local Sears or Autozone?
Old Jun 11, 2007, 11:41 AM
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Originally Posted by Sap12687
Should i be able to pick this up at a local Sears or Autozone?
Go to Sears, they will for sure have them
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