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Determining threads on coolant plug for tapping
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Determining threads on coolant plug for tapping
Trying to straighten the threads on my coolant drain plug, Am i correct that the thread is 3/8 16 and is this tapered pipe thread or just regular pipe thread Thanks Billy
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Re: Determining threads on coolant plug for tapping
Pretty sure it's 1/4" NPT.
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Re: Determining threads on coolant plug for tapping
Irwin Hanson High Carbon Steel SAE Pipe Taper Tap 3/8 in.-18NPT 1 pc
would this be the correct Tap Thank you Billy
would this be the correct Tap Thank you Billy
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Re: Determining threads on coolant plug for tapping
I see it has the word taper in it
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Re: Determining threads on coolant plug for tapping
Hi,
Below is a listing at TM Tractor for a new cooling system drain plug, you can look at the info and pic.
http://www.tmtractor.com/new/st/3833fp.htm
Below is a listing at TM Tractor for a new cooling system drain plug, you can look at the info and pic.
http://www.tmtractor.com/new/st/3833fp.htm
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Re: Determining threads on coolant plug for tapping
Command52 wrote:Irwin Hanson High Carbon Steel SAE Pipe Taper Tap 3/8 in.-18NPT 1 pc
would this be the correct Tap Thank you Billy
Yes. Npt is national pipe thread, which has a taper
Thomas
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Re: Determining threads on coolant plug for tapping
There is a thing called a screw pitch gage / thread pitch gauge.
Comes in real handy at times like this!
https://www.starrett.com/category/11150 ... tBy=wp/asc
Comes in real handy at times like this!
https://www.starrett.com/category/11150 ... tBy=wp/asc
1968 Cub Fast-Hitch
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Re: Determining threads on coolant plug for tapping
I would use a brass plug with either pipe dope on it or Teflon tape on the threads….remember you may want to remove that plug years from now or for next generation of Cub owner.
NJ Farmer
NJ Farmer
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Re: Determining threads on coolant plug for tapping
NJ Farmer wrote:I would use a brass plug with either pipe dope on it or Teflon tape on the threads…remember you may want to remove that plug years from now or for next generation of Cub owner.
NJ Farmer
Risk of galvanic corrosion. Not something I would do. I would use Copper or Aluminum anti-seize.
Just one persons opinion.
Walter
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Re: Determining threads on coolant plug for tapping
A brass plug (or fitting) will work very well with cast iron, I’ve used them for years, I’ve never seen any reaction between the two materials. I’d avoid using aluminum but about anything else will work.
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Re: Determining threads on coolant plug for tapping
Again thank you guys very much I would be lost without you
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