Technical ? Copper fuel fittings

I’m having trouble finding br*** fittings to finish the plumbing for copper fuel lines for my flathead, I just need two 1/4 flare to ford nut (1/2 20) fittings, anyone know a source or have a part number?

 

I have few old flare fittings , any chance to get an image ?

 

I guess I should have mentioned that the fittings are br*** for copper tube, I have a number of the flare nuts as pictured, I need two of the fittings to the left that are ford nut (1/2 20) and 1/4 flare, the one I pictured is 1/4 NPT to 1/4 flare… Thanks!

 

Try a refrigeration supplies. Looks like a standard 45 degree flare fitting, commonly used in air-conditioning and refrigeration.

 

why do you want copper fuel lines ?

 

McMaster-Carr, we use fittings like that on air brake plumbing on heavy duty trucks. Locally, there is an industrial supply house called Superior Fastener that we use at work.

 

Looking at McMaster-Carr… great listings, thanks! Same problem I’ve found everywhere else, the 1/4 45degree flare is pretty common, the 1/2 20 end that would go into the carb is not… that’s what’s really hanging me up, the carb end.

 

Another of those "Ford exclusivity" parts ! You had to buy it from ford ! Is the 1/2-20 part a straight cut thread or tapered ?

 

Probably would take 15 minutes to turn one out on your lathe; times 2 - 30 minutes.

Jon

 

they say copper lines will work harden and break. A previous owner ran copper from the gas tank to the carbs on my 1939 Ford that I drove daily for 17 years thru 4 states. It didnt break but very fine copper flakes continuously filled my gas filter. I had to stop on the side of the road many times to blow out the filter so I could continue. I replaced the copper with 3/8 stainless and no more problems.

 

If I only had a lathe and the knowledge on how to use it… there’s plenty of material in a couple of the fittings I have to turn them down, just don’t have the means to.

 

I found 1/2 straight to 3/8 jic male. Common fitting at your local hydraulic hose shop. You could always bag copper and go jic fittings. Very cost efficient

 

That one’s so close, not sure about the 5/16 thread on the carb side, all of my research says it’s 1/2 20….tried a 5/16, wouldn’t thread into the carb… This one is close except it’s 37 degree, not 45!

 

https://www.racetronix.biz/p/adapter-6-jic-male-1-2-20-unf/adf-6j1220unx don’t forget the crush gasket

 

Thanks but that’s a number -6AN - need 1/4 45 degree flare to 1/2 20 (ford or stromberg).

 

The 5/16 refers to the tubing size , the thread size is what your after , that I " think" is 1/2-20

 

Did I just stumble upon it? Seems to be able to use a sealing washer on the big end and flare looks to be 45*. Nope, 37* AN. https://www.ebay.com/itm/192876876206?chn=ps&_trkparms=ispr=1&amdata=enc:1ts2fOKZBQBqkNwp9pvxgSg88&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=192876876206&targetid=1644837435523&device=m&mktype=pla&googleloc=9031247&poi=&campaignid=20125739985&mkgroupid=149128855676&rlsatarget=pla-1644837435523&abcId=9312975&merchantid=101725536&gbraid=0AAAAAD_QDh_NA_rXuMHTT5FuL1ceFbc24&gclid=EAIaIQobChMIuoDgl7vr_wIV6BetBh2lIQwyEAQYAyABEgLGWPD_BwE

 

Thanks again, I’d tried a 5/16 as shown, it doesn’t fit it’s really close but just large enough and it must be like 18 instead of 20… the fitting above fits perfectly but isn’t 1/4 flare

 

That’s the frustrating point about this whole thing, the 5/16 flares that I have will not thread into the carb.

 

5/16 flare… as per Strombergs site the regular 97 needs 1/4, the big 97, 5/16 so… I picked up some 5/16 to go from the mechanical pump to the distribution block that is part of my manifold, wanted to go 1/4 from the block to the carbs… everything is good except for these last fittings at the carbs. I have 5/16 45degree flare fittings (both male and female), and the males definitely do not thread into the carbs, the fittings I showed were a 1/2 2o that I pulled off a carb and a 5/16 flare to 1/4 NPT that was an extra…the 1/2 20 will thread into the female 5/16 flare nut but the 5/16 male flare will not thread into the carb.

 

Good grief! How does anyone plumb these things, it sounds like a nightmare.