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Old 12-05-2012, 01:03 AM   #1
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Default What size hole to drill for thermometer

It is a 1/2" inch threaded end.


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Old 12-05-2012, 01:06 AM   #2
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1/2" NPT requires a 7/8" (actual) hole.


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Old 12-05-2012, 01:06 AM   #3
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If you want a really super tight fit that you would have to thread in, 45/64", but I think 7/8" is more along the lines of what you are looking for.
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Old 12-05-2012, 01:07 AM   #4
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Measure the width of the threaded part. That has to go through the hole.
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Old 12-05-2012, 01:08 AM   #5
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http://www.bargainfittings.com/index...formation_id=9

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Old 12-05-2012, 01:13 AM   #6
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Quote:
Originally Posted by kh54s10 View Post
Measure the width of the threaded part. That has to go through the hole.

Just did and it looks like 3/4" would be a nice fit. 7/8" on the other hand looks WAY too big. I'll break out the step bit and take it slow I guess.
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Old 12-05-2012, 01:16 AM   #7
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They suggest 13/16", which is a hair bigger than 3/4", so I was pretty close. Thanks!
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Old 12-05-2012, 01:16 AM   #8
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Quote:
Originally Posted by seedubxj

Just did and it looks like 3/4" would be a nice fit. 7/8" on the other hand looks WAY too big. I'll break out the step bit and take it slow I guess.
Its just an 1/8" and it will be split on both sides all the way around. I would start at 3/4". It may fit, threading in easily or it may be a no go depending on the stock and tooling of the manufacturer.
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Old 12-05-2012, 01:17 AM   #9
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Quote:
Originally Posted by seedubxj View Post
Just did and it looks like 3/4" would be a nice fit. 7/8" on the other hand looks WAY too big. I'll break out the step bit and take it slow I guess.
I did an installation a while ago and drilled until it was very close then used a Dremel tool and ground out the hole until it had a very snug fit through the hole.
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Old 12-05-2012, 01:25 AM   #10
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Thanks for all the help guys. Gunna get at it after the kids go down. Assuming I don't screw it up, I'll post some pics. Who doesn't love kettle porn, right?


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