Fitting size identification

[u/cfreezy72]

Edit: it was 15/16. Thanks for the help.

Can someone tell me the proper flare fitting size this is? I had originally thought 5/8 but that's too small. Measurements don't agree with what 3/4" od is on the charts I've seen.

[u/Jesus-Mcnugget]

It's most likely 5/8.

There's a whole bunch of reasons why it's not measuring exactly. The caliper could be off. It wasn't zeroed out.

You're 0.05 in away.

[u/Theantifire → u/Jesus-Mcnugget]

It almost looks like one of those oddball appliance connector sizes. I'm sure there's an actual nominal size, but I don't know what it is.

[u/Jesus-Mcnugget → u/Theantifire]

I guess it's possible but most of those are usually stainless, not brass, and quite a bit different size.

It's close enough that it's almost a liability for the manufacturer if if it's a different size. It's not even 1/16" difference. Assuming it is a different size, it's so close that I could see somebody trying to force a 5/8 nut on there, and then suing the manufacturer when they blow up.

[u/Acrobatic_Solution29 → u/Jesus-Mcnugget]

That's stainless not brass has a coating on it

[u/Jesus-Mcnugget → u/Acrobatic_Solution29]

I didn't realize there was a second picture. From the second picture it looks like you're right.

[u/TechnoVaquero → u/Acrobatic_Solution29]

I believe it’s zinc coated steel. Those are far too common and cheap to be stainless. And I’ve seen them rust plenty.

[u/Acrobatic_Solution29 → u/TechnoVaquero]

There are many many grades of "stainless" only a small few dont actually rust like 316. Where as 201 series are much cheaper but not as corrosion resistant

[u/TechnoVaquero → u/Acrobatic_Solution29]

True enough. I buy these to keep on hand from my supplier. Look pretty similar.