I’ve been trying to help my husband chase down a “union t-fitting” for the brake system on his 67 Mustang. The specs are 1/2 20 - 3/16 seat. We can’t find those exact specs anywhere. Do you know of suppliers who would sell this? It has to accommodate high pressure.
Thanks for your help!!
I’m a little lost here. It must be because it’s early and the caffeine has not yet kicked in.
1/2 X20 is a national fine thread.
3/16 seat has me baffled. You say it’s for a brake system, the brake systems on old Mustangs use double flare fittings. IIRC these tubes are 3/16.
I’m sitting here trying to recall everything I know about early 'stangs but it has been more years than I can to mention since I worked on one.
A '67 should have a single master system. There should be a single solid brake line from the master. It should hit a junction (probably below the master near the firewall or inner fender where it Tees off to front and rear, and then two more tees to individual wheels. There will be rubber hoses to allow the suspension to move, then out to the brakes themselves. There may be a union under the car put there for ease of assembly to join two pieces of solid line so that the assembly line did not have to mess with one honking long piece.
So what’s with the 1/2 X 20 part of your question? 1/2 X 20 is a honking big bolt. I don’t recall anything on an early 'stang brake system that uses a bolt that size.
If you need a double flare union or tee they should be available from a very good auto parts store or maybe on the net. I just did a google on brake parts and all the links are in the UK. My google-fu is weak this morning. If it’s lines you are looking for Bundy tubing is available and double flares can be fabricated using double flare tool this link is a how to article.
Throw me a bone here, what exactly is hubby looking for?
Forgot to add, if you want e mail is in my profile. I have a couple of students that are old Ford guys, and will be happy to toss this question to them once I understand what it is you are looking for.
Thanks, Rick. Without attempting to sound like I know what the hell I’m talking about, he’s doing some new-fangled stuff that isn’t like the old way. And I think he’s got all kinds of line running…not just one piece. I may take you up on your email offer. I’ll have him dictate to me exactly what the situation is. He’s the car guy…I’m the typist.
Also, he said it’s a dual system. Not a single. I just talked to him.
When I lived in Dallas and owned a 1970 Mustang, I always used to go to the Mustang Parts Corral to get whatever I needed. They made all manner of replacement parts. Their contact info is on this page. Have you contacted them, or anyone like them? I am assuming you have, but ya know, just in case.
Thanks for the link! I’m not sure how much help it will be, since it isn’t a part that was originally on the car, but there may be somone in the forums who did something like this.
Ah. I guess that does complicate things if it is not original equipment.
Still…there’s someone out there who’s soupin’ up an old Mustang. I’m sure it will be useful.
While driving into work today, I think the caffeine kicked in enough that I understand the question.
Ask your hubby if the 1/2 20 is refering to the wrench size he is using to undo the nut on the fitting (1/2). If that is correct then I am guessing the 20 is the threads per inch on the nut that he is unscrewing.
If so, I understand (I think) what is going on, and can answer his questions.
Dual masters wern’t required til '68 IIRC, but Ford may have changed production over early, or some in the past some may have upgraded it.
Ask your husband what he is using for brake lines. Bundy weld tubing, copper tubing, or stainless steel? (it makes a difference)
Ask him if he owns a double flaring tool.
Get back to me with the details.
The thread count is correct. 20 threads per inch. And I think the '67 was two releases of cars that year. I believe his car came out in the 2nd half but I’m not positive. I think he’s using braided line.
All this will be verified when he gets home. Thanks again for your help.
OK now we are almost on the same page.
Braided line is used to replace the standard rubber hose for the flex lines out to the wheels.
I need to know if he is changing the hard lines that are attached to the car, and if so with what material? Bundyweld (soft steel) copper, or stainless.
Sounds like Rick’s got things covered, but just in case…when I needed something odd like that fabricated, I’d take as many parts of it with me as possible to a hydraulic supply store, about 10am on a Tuesday. (like when they’re not busy)
A well stocked place with a helpful shopkeeper can usually fix you up.
Automotive stuff is all pretty standard. Once I fully understand just what he is trying to do, it should just be a matter of pointing him in the correct direction. Hopefully no fabrication will be necessary.
He really just needs to know where he can get the part. He knows what he wants to do…just can’t find a part with those specs. He’s found some with different specs, but…as you know that and a dollar will get you a cup of coffee.
I will be happy to direct him to a source, but I am not one hundred percent sure of what he needs. I need a good description of exactly what he is trying to do.
Usually if someone is trying to change out rubber brake lines for braided, the new lines are bolt on replacements for the old ones. No adapters or unions needed. Since you husband is asking for the source for a union, he must be doing something other than a straight change out with the correct line.
This site has what he’s looking for (see the boxy-looking one at the end of the page). Unfortunately, the specs don’t meet what he needs. It’s called a “union tee”.http://www.fittings4less.com/onlinecatalogpage.php?page=59
Howzabout posting a photo of the fittings he needs to connect to the Tee with some basic descriptions. If you can’t post photos then let me know (post or email) and I’ll post 'em for ya.
See above. This is the only picture we could find.
He says he’s going to probably use braided line, though he said the regular steel line is still an option.