Need Help With Tubing Thread Size

Maybe this is my excuse to do some brazing. I do have acetylene for a heat source.

Yes I have visited the Swagelok site. Their stuff is definitely pricey - but I can tell it is stop shelf. It would be overkill tho for my project (and my wallet).
 
I would find a fitting for that hiding in a piece of brass stock.
 
Refrigerator water line fittings will work. Standard city water pressure is usually between 40-100 pounds so you will be fine. Any hardware appliance store will stock the fittings.

Swaglok fittings are class on the field! Love them.
 
I really appreciate all the feedback guys. I wish I had dropped in here sooner.

At the moment I am thinking of trying a 1/16"-27 NPT thread, which will allow me to use a reducer bushing to get to 1/4" NPT. (I just now learned the difference between a cutting die and a re-threading die BTW!)
 
scoostraw said:
I really appreciate all the feedback guys. I wish I had dropped in here sooner.

At the moment I am thinking of trying a 1/16"-27 NPT thread, which will allow me to use a reducer bushing to get to 1/4" NPT. (I just now learned the difference between a cutting die and a re-threading die BTW!)
Click to expand...
At .313" for the major diameter of the thread and a taper of 1/16" per inch, you would not have a full thread on 1/4" tubing. You would probably have enough thread to fasten the tubing and you could use epoxy for the seal. Personally, I would just braze or silver solder. If I required the ability to break the connection, I would use a compression fitting. McMaster sells Yor Lok fittings which are similar to the Swage Loc fittings but at lower cost.
https://www.mcmaster.com/compression-fittings
 
Yes this may or may not work. I think 1/16" pipe is bigger than I thought. Interestingly, the production version looks like it has epoxy as a sealant.

I will try it. But I too am thinking of brazing or soldering.
 
I just threaded some 1/4 OD SS tubing 1/4 - 28 for the feed and exhaust line on a model steam engine. I let the male thread bottom out against the flange and they seam to seal fine at 20 or so psi.

Greg
 
That's interesting because I wanted to thread the other end of this using 1/4-28 straight thread. However I need to use a barrel nut, and I have not been able to find any in that thread. I may have to use metric (and get them from China at that).
This photo is what I am referring to.Zinc-Plated-Fasteners-Hex-Head-T-Nuts.jpg
 
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