Npt double end stud

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hotblast1357
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Post by hotblast1357 » Tue. May. 21, 2019 12:14 pm

Hey everyone, I am looking for some double ended studs, one side has NPT to go into a boiler so that it can be water tight, and the other end to just have a common thread size for a nut. Something like the studs on a DHW coil on a boiler. Can anyone point me in the direction of some?

Thank you!

 
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coaledsweat
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Post by coaledsweat » Tue. May. 21, 2019 1:57 pm

Good luck. I would get a schedule 80 nipple and tap it for a stud.

 
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Post by franco b » Tue. May. 21, 2019 2:53 pm

You could epoxy a long enough bolt inside the pipe nipple.

 
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Post by McGiever » Tue. May. 21, 2019 5:00 pm

Axeman-Anderson stocks and sell them for their tank-less coil mount/seals.
They will send items by C.O.D. or you may send them payment first with a personal check by snail-mail and then they'll send them right out.

 
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hotblast1357
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Post by hotblast1357 » Tue. May. 21, 2019 8:06 pm

Thanks everyone


 
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Post by wilder11354 » Wed. May. 22, 2019 6:22 pm

A good machine shop with stock steel bar stock can bang them out in minutes! Go ask a local independent shop in your area.

 
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Post by Richard S. » Wed. May. 22, 2019 6:39 pm

franco b wrote:
Tue. May. 21, 2019 2:53 pm
You could epoxy a long enough bolt inside the pipe nipple.
That's the direction I would be going, I'd up the ante and drill through the fitting and bolt and put a small bolt or cotter pin through it. If you can find some washers the same size as inside diameter of the fitting you are golden.

 
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hotblast1357
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Post by hotblast1357 » Fri. May. 24, 2019 3:55 pm

I reached out to axeman, they haven’t responded to me.

I guess it would help to tell what I’m doing..

My boiler has a 4” NPT plug where the dhw coil goes, I am putting a 240V electric heating element in the plug so that I can keep my boiler warm through the summer, instead of a light bulb. So I have to put the element in a plate of steel and bolt the steel onto the coil plug.

 
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Post by coaledsweat » Fri. May. 24, 2019 4:46 pm


 
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Post by Scottscoaled » Fri. May. 24, 2019 6:57 pm

I get them from NAPA. Ask for 1/2" exhaust studs


 
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hotblast1357
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Post by hotblast1357 » Sat. May. 25, 2019 5:33 am

Scott I didn’t think exhaust studs where pipe thread on one side?

 
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Post by coaledfeat » Sat. May. 25, 2019 9:04 am

Would it be re reasonable to use a bushing or two ? Might be easy yo undo or use different element later.

 
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Post by Scottscoaled » Sat. May. 25, 2019 3:14 pm

I use the studs from NAPA to repair DHW coil studs. Drill and tap using NPT tap ( 1/2" x13 npt I think) and use1/2" nuts to secure. They have all combinations of different thread sizes there. They might not be called exhaust studs either.

 
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hotblast1357
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Post by hotblast1357 » Sat. May. 25, 2019 6:22 pm

Ok thanks!

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