Thread pitch and Diameter Question
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Senior User
Joined: Feb 2004
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From: Denver, CO
Thread pitch and Diameter Question
What is the thread pitch and diameter of the coolant plug on the passenger side of the 7.3 IDI? My model year is 94.
I would like to make a fitting so I can drain my coolant without making such a mess.
Thanks,
Chris
I would like to make a fitting so I can drain my coolant without making such a mess.
Thanks,
Chris
Posting Guru
Joined: Mar 2005
Posts: 1,701
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From: KY
It is going to be a pipe thread. Probably 3/8 or 1/2.
If it a SAE thread it will have a o-ring seal. You don't see that much on engines because most sensors or switches are a pipe thread. Rarely will you see that, basically, because of the added machine work on the engine casting to be able to use an SAE or Metric thread plug or sensor.
If it a SAE thread it will have a o-ring seal. You don't see that much on engines because most sensors or switches are a pipe thread. Rarely will you see that, basically, because of the added machine work on the engine casting to be able to use an SAE or Metric thread plug or sensor.
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
Standard pipe thread.
I can't remember, I think it may be 1/4" pipe thread.
You should be able to get a block drain at an auto parts store that will thread right in.
Catfish has me wondering now, may be 3/8" pipe thread, I know it is not 1/2" though.
I can't remember, I think it may be 1/4" pipe thread.
You should be able to get a block drain at an auto parts store that will thread right in.
Catfish has me wondering now, may be 3/8" pipe thread, I know it is not 1/2" though.
Elder User
Joined: Oct 2006
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NPT = "National Pipe Thread Tapered"
The term "pipe thread" is slang for NPT.
There's "standard" and there's "metric" and then there's "Canadian"
Sorry, I couldn't resist!!! ...
In the US 1/4" NPT specifies diameter, pitch, and taper (0.540", 18, 0.05556). There's no ambiguity and it is a standard. The entire world may not use it, but it's still a standard.
The term "pipe thread" is slang for NPT.
There's "standard" and there's "metric" and then there's "Canadian"
Sorry, I couldn't resist!!! ...
In the US 1/4" NPT specifies diameter, pitch, and taper (0.540", 18, 0.05556). There's no ambiguity and it is a standard. The entire world may not use it, but it's still a standard.
Thread Starter
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Senior User
Joined: Feb 2004
Posts: 162
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From: Denver, CO
1/4 Npt
That sounds easy enough for me to make a fitting that will help me drain my system.
Thanks to all,
Chris
Thanks to all,
Chris
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NPT = "National Pipe Thread Tapered"
The term "pipe thread" is slang for NPT.
There's "standard" and there's "metric" and then there's "Canadian"
Sorry, I couldn't resist!!! ...
In the US 1/4" NPT specifies diameter, pitch, and taper (0.540", 18, 0.05556). There's no ambiguity and it is a standard. The entire world may not use it, but it's still a standard.
The term "pipe thread" is slang for NPT.
There's "standard" and there's "metric" and then there's "Canadian"
Sorry, I couldn't resist!!! ...
In the US 1/4" NPT specifies diameter, pitch, and taper (0.540", 18, 0.05556). There's no ambiguity and it is a standard. The entire world may not use it, but it's still a standard.
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If only it wasn't soooo cold there, I'd move in a second -- I spent enough time in Toronto to find a new bride...
Probably the most amusing thing I saw there was a couple of young guys laying carpet. They had a tape measure marked in both inches and meters, and were calling out measurements in inches. When I ribbed them about it, they got nervous and started calling out metric.
Probably the most amusing thing I saw there was a couple of young guys laying carpet. They had a tape measure marked in both inches and meters, and were calling out measurements in inches. When I ribbed them about it, they got nervous and started calling out metric.
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