brass fitting

[Aaron]

As you will see in the pictures attached, this is a brass fitting that goes into my rear top wheel cylindar. The brake line then goes into this brass fitting. It is leaking from the threads that go into the wheel cylindar. I have been everywhere trying to find a replacement that fits the length and nut size, but have not been able to find anything.

Does anyone have a good extra one or know where to get a close replacement? I have tried Napa, carquest, advanced auto, and several other local auto parts stores.

[woodscavenger]

Can you use teflon tape like what is used in plumbing?

[Aaron]

I had a brake place recommend that the other day, tried it and still have a very , very slow leak.

[TodFitch]

How is that part different than a relatively standard '1/8"NPT Male to 3/16" Inverted Flare' fitting?

At least that is what it looks like to me from your photos. I am probably off on the size, and since my car does not use that dual cylinder setup I can't just go and look at it.

[Guest Kuster13]

I am not 100 percent sure but I can't imagine teflon tape or any other thread sealer to be acceptable for any brake application due to the pressure involved.

It does appear to be a standard fitting and should be readily available at most auto parts outlets.

Tom

[Aaron]

Ahh.. but it is not standard. What I thought would be pipe thread on the male end is 7/16" bolt thread with 1/4" tube thread for the female end.

All parts stores have these brass fittings, but the male ends are pipe thread!

[Guest Kuster13]

I have experienceyour frustration when looking through incomplete parts drawers at the parts suppliers.Below is a quick copy and paste from napa online. Is that what your looking for?

Brake Line Fitting - Metal, 1/4'' Tube Nut (7/16"-24 Inverted)

Front

Part: BK 6413298

Product Line: Balkamp

This part can only be purchased from your local NAPA Auto Parts store.

Features & Benefits

High-Quality Steel Tube Fittings For Building Fluid Transfer Lines, Carded Fittings Also Include Cross-Reference Information & Dimensions For Easy Identification

Attributes

Adapter Size : 1/4'' Tube Nut (7/16"-24 Inverted)

Fitting Brake Line Size : 1/4"

Manufacturer : American Grease Stick Company

Manufacturer Part Number : BLF-13C-5

Tom

[Merle Coggins]

The threads won't seal like a pipe thread because they are a straight thread, unlike the tapered threads of pipe. There is supposed to be a copper washer under the head of that fitting to seal against the wheel cylinder. Without a good copper washer I would imagine that it would/could leak. If the threads are in good shape, go to your local parts store and ask for copper washers that will fit that fitting. Install them and be done with the leak problem.

Merle

[TodFitch]

The threads won't seal like a pipe thread because they are a straight thread, unlike the tapered threads of pipe. There is supposed to be a copper washer under the head of that fitting to seal against the wheel cylinder. Without a good copper washer I would imagine that it would/could leak. If the threads are in good shape, go to your local parts store and ask for copper washers that will fit that fitting. Install them and be done with the leak problem.

Merle

I should have guessed: The threaded fittings on my brake wheel cylinders are a 7/16 fine thread too. The copper crush washers should be available at your better auto supply stores and maybe your existing fitting will be fine when used with the washer.

You are looking for a Raybestos G1242 or a CarQuest W28 copper washer. Don't know what the NAPA number is but when you find out, please post it so we all can add it to our cross references.

[grey beard]

Mr. Forest,

Had the same problem myself last fall. My new upper rear wheel cylinders came from Andy Bumbum. One had this elusive fitting that you now seek and the other was miussing this part. I first called him and tried to explain what I needed, but to no avail. He simply did not - or would not - understand. I then turned to NAPA and took my new wheel cylinder along as well as a new front flex hose. You may notice that the front flex hoses have the same thread as the rear upper wheel cylinders. With a male and a female thread to measure, my NAPA man discerned that what was needed was a 7/16 x 20 fitting.

Merle is right - this fitting is shouldered and must have a brass seal gasket between itself and the wheel cylinder casting. Not many parts men are gooe enough to work this stuff out or help when you need a specific part like this.

I was able to get the right piece from NAPA via special order, and also got one from Bernbaum when I called and got hs helper - who is MUCH smarter, knew exactly what I needed, and had one in the mail to me asap.

Having said all this, what you need is a 7/16 x 20 pitch male thread sholdered fitting that accepts 1/4 flare fitting on the female side. In point of fact, whomever sold to you those wheel cylinders should have been made to furnish the fittings to you as well. If they're onna' be in the parts business, they should do it right. JMHO

Gooe Luck. Teflon tape is for low pressure stuff. We are talking about thousands of pounds of pressure on critical parts. They gotta' be right. Period.

[Aaron]

Thank you everyone for your great information. This has been very frustrating and have looked at more fittings then I ever thought I'd have to and have talked to many parts people that don't have a clue! I will make my

4th trip to NAPA for this issue and see if they can help me.

By the way, I have definitely been using a copper washer with these brass fittings.

I will let you all know what I find out...

[Aaron]

Grey Beard, Do you remember what the part number for the NAPA special order was? They have a fitting that has the 7/16 - 20 male, 1/4" inveterted female end, but the male threads are not as long as my original fitting and the nut on my old fitting is 5/8 hex and the one NAPA had in stock was 11/16" hex which won't fit through my back brake plate. I spent 2 hours there and walked out with nothing.

After the guy at NAPA proceded to turn in the wrong fitting and ruined my new wheel cylindar, I finally got in through their heads they needed a 7/16 - 20, not 7/16 - 24 male thread. ( they have a new wheel cylindar on it's way by the way)

[Guest NAZGUL50]

The weatherhead # from NAPA is 7732

-Scott

[Aaron]

Scott,

That part number is the fitting I found where the threads worked, but the the threaded area was not as long as the original and the nut head is bigger and won't fit through the brake plate when trying to mount.

[Aaron]

Do you think the late 40's early 50's dodge cars would have this fitting?? There is a salvage yard near here and they said they have some cars but not sure if the fitting will be on them...

[Aaron]

Does anyone have an extra fitting off a parts truck they could spare?

[Byronb3b]

Think I have a spare you can have, send me pm. Byron

[grey beard]

Cars use this same wheel cylinder casting - but on the front, hence they are fed by flex lines and not 1/4-inch steel flared tubing, so you won't be finding any joy in that quarter.

Near to me is a very good hydraulic shop - Beiler Hydraulics. Stopped there today and checked,, and they can come up with a workahle solution in two pieces. If you cannot source this elusive fitting, let me know and I will go to them and pick it up for you and mail it to you. Where do you live, Mr. Forest? If you wish me to do this, just give me your mailing address.