Brass fitting thread identification

[Lilhigbee]

Hopefully the vast range of knowledge here will contain the answer to my question. I have a brass fitting that I am trying to identify so I can replace it. It is a straight connector with standard 1/2"-20 female threads for 5/16" inverted flare fitting on one end with .520"-20 male straight thread on the other end. That is the measured OD of the thread so it is probably a nominal .524" or .525" diameter. I also have the same style of fitting with a .520"-18 male measured thread on it. The fitting is intended to seal with a copper washer. I've looked through the specs on every type of fitting I can think of with no luck. It is not a CGA, JIC, whitworth or metric thread. Neither McMaster-Carr nor Grainger show anything with this thread. No list of thread standards that I have found shows it either. Help!!

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[Mikej]

This is interesting. If you're stumped, it might be from space aliens? Can't help at all, but want to watch.
Carry on.

 

[jbett98]

The guys at Advanced Hydraulics Supply would know. They have a lot of fittings.

Is this for an automotive brake system?


4444 NE 148th Ave. Portland, OR 97230

Phone: 503-289-0354

 

[Unka-Boo]

What's it on? Fuel system of some sort?

 

[Lilhigbee]

Not sure what it is from originally. I had one in my miscellaneous fittings bin and modified it for another use. That one got damaged and I'm trying to find a replacement I can modify. I needed the 5/16" female flare fitting with a male 1/2-20 thread on it but they don't make those. I took this one and turned it to 1/2" on the lathe and ran a 1/2"-20 die over it and it was perfect. Easy deal. I didn't realize I may have the only one in captivity.

 

[Unka-Boo]

Adapter, Brass, F(1/2-20 I), M(1/2-20), Bag of 1

Adapter, Brass, F(1/2-20 I), M(1/2-20), Bag of 1

www.agscompany.com

Maybe? I think 1/4 flare is 1/2-20, where 5/16 is 9/16 thread normally...

 

[Lilhigbee]

Adapter, Brass, F(1/2-20 I), M(1/2-20), Bag of 1

Adapter, Brass, F(1/2-20 I), M(1/2-20), Bag of 1

www.agscompany.com

Maybe? I think 1/4 flare is 1/2-20, where 5/16 is 9/16 thread normally...

That's exactly what I need, thank you!! Got one on the way. Still want to know what this other thread size is intended for though.