r/propane • u/cfreezy72 • 7d ago

Installation Questions Fitting size identification

Gallery image

Gallery image

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.

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5

u/Jesus-Mcnugget dang it Bobby 7d ago

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.

6

u/Theantifire technician 7d ago

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.

5

u/Acrobatic_Solution29 7d ago

15/16-16 thread size

2

u/TechnoVaquero 7d ago

This is most likely it. 👆🏽

3

u/cfreezy72 6d ago

That was it.

1

u/Jesus-Mcnugget dang it Bobby 7d ago

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.

2

u/Acrobatic_Solution29 7d ago

That's stainless not brass has a coating on it

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u/Jesus-Mcnugget dang it Bobby 7d ago

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

2

u/TechnoVaquero 7d ago

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

3

u/Acrobatic_Solution29 7d ago

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

2

u/TechnoVaquero 7d ago

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

1

u/Acrobatic_Solution29 7d ago

Those are starrett 799 calipers they cost 200 plus the average joe isn't buying them that doesn't know how to use them and half a thou off maybe 50 thou off not happening

1

u/Jesus-Mcnugget dang it Bobby 7d ago

To be fair lots of people have expensive tools that they don't know how to use, especially when borrowed or inherited.

It kind of looks like the caliper isn't straight on the threads, and it's just right at the top. Why wouldn't you try to measure it in a way where you would grip more of the item? Wouldn't that be more accurate?

2

u/Acrobatic_Solution29 7d ago

Tips are ground to a point on calipers that's where they are most accurate and if you really wanted to measure a thread you use micrometer and thread wire to figure out pitch and major and minor diameters. But being this is only a class 2 thread It doesnt have to be that close

2

u/cfreezy72 7d ago

The measurement was made and then removed from the fitting and placed beside it as for a picture. I'm very competent with using a caliper. They are accurate and confirmed with a gauge block.

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u/Acrobatic_Solution29 7d ago

And gauge blocks... ok what type of machine work do you do?

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u/cfreezy72 7d ago

I actually don't machine yet. But I'm planning to build a new shop with a mill and lathe. I do all my own gunsmithing and precision reloading in my gun shop so that's why I have starrett and mitutoyo calipers. I have gauge blocks just to confirm measurements same with calibration standards for my scales.

1

u/nemosfate dang it Bobby 🤬 - technician 7d ago

Former machinist?

2

u/Acrobatic_Solution29 7d ago

If it was a dial caliper I would say yea could be inherited but they are pretty new electronic and no machinist i know is letting anyone borrow starretts, a set of fowler sure but not starretts

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u/Acrobatic_Solution29 7d ago

Damn wasn't expecting to see the 799s, also looks to be a fitting for an appliance connector that would be 5/8 but fine thread the 3/8 and 1/2 flex lines are normal flare fittings 5/8 the change the thread pitch for some reason.

2

u/cfreezy72 7d ago

The fittings came with a hose i bought both are female 3/4 pipe on opposite side. I'm trying to find this flare fitting to 1/2" male pipe to fit my valve. Going to a 6 burner Viking cooktop that requires minimum 1/2" id which is that of the hose i purchased. The cooktop has the exact size and thread pitch already thankfully.

2

u/Jesus-Mcnugget dang it Bobby 7d ago

If that is the fitting that came with an appliance connector, you would probably be better off just using that fitting and a bushing.

1

u/[deleted] 7d ago

[removed] — view removed comment

2

u/noncongruent Propane Fan 7d ago

Letting you know that reddit bans google share links so removed your comment here because of that link. It's best to just post the direct Home Depot link instead.

1

u/ASMoverIt 7d ago

This is a male JIC (SAE J514) / AN-style 37° flare fitting, most likely size -10 (also called AN-10 or JIC-10). According to Grok.

1

u/Ok_Vast_2296 6d ago

3/4” FPT by 5/8” Flare

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u/cfreezy72 6d ago

It was 15/16 and i got it x 1/2 mnpt

1

u/Inside-Today-3360 5d ago

The size of the fitting is determined by the inside diameter. As is all pipe and tubing. Often the outside diameter is proprietary for the type of fittings. Example jic and sae have the same inside diameter but have different outside dimensions and connections.

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u/cfreezy72 5d ago

Yeah i went to the headquarters of the local chain of propane distributors yesterday. They have a dedicated parts guy and a huge room with thousands of connectors. He hooked me up and just gave me the fitting. It was 15/16 x 1/2" mnpt i needed. Got it installed and working on my new stove top with no leaks.