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Joined: May 2026
Posts: 99
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'Bolter
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While replacing a brake line, I cross threaded the connection into the junction block that sits to the right of the transmission cross member. I’ve looked and can’t find an exact replacement online. Does anyone know where one can be found? I did find the junction that goes on the rear axle available for purchase. Aren’t the threads the same as the one up front? I just wouldn’t be able to bolt it to the frame. Would that be an issue? The line from the master cylinder is larger than the front and rear brake lines for the front block. Seems to be the same with the hose and rear hard lines. I appreciate any advice.
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IMG_5924.jpeg (203.64 KB, 117 downloads)
IMG_5923.jpeg (123.9 KB, 120 downloads)


1952 5 window 3100
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Bill
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O
'Bolter
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A junction like that shouldn't be that hard to find. It might not look exactly the same but it will work.

Try McMaster -Carr. www.mcmaster.com

Or this company:

Specializing in antique, vintage, classic, obsolete, unique and hard-to-find brake parts, bonding, riveting, rebuilding, drum and rotor machining, custom made brake hoses

Brake Materials & Parts Inc
800 Sherman Boulevard,
Fort Wayne, IN 46808
260-426-3331
http://www.brakematerialsandparts.webs.com/


1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
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H
Kettle Custodian (pot stirrer)
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A small piece of angle iron and a couple of machine screws would adapt the fitting you found into a frame-mounted item. Just be careful not to drill into the fluid passageways with the holes for the screws. Vibration will cause hard lines to crack at the flare fittings if the junction block isn't mounted rigid.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT
Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT
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Bill - What are the port inlet and outlet sizes on your T-fitting? If they are both 1/4", this Classic Parts Brake Line T-block fitting may be just what you need.

Their description doesn't include 3100 1/2 tons, but the picture looks to match your 2nd one above.

The same item from Jim Carter MEE247 has a more detailed description of "1947-50 All, 1951-57 3/4, 1, 1 1/2 and 2 ton. Frame rail divider block with retaining nut. This brake line T attaches to right frame rail. Receives master cylinder line and divides it to front and rear wheel cylinders. Includes retaining nut. Is 1/4" inlet and 1/4" outlet. Sold each master cyl line = 7/16"other 2 lines are both 3/8" "


~ Dan
1951 Chevy 3 window 3100
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Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
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The one from Jim Carter may be correct. But Dan's link to the classic parts one is likely not (goes by the right front wheel) I have a couple spare division blocks, but would have to check to see if I have the one you need.

I'm assuming this (pic) is the one you need. Pokes thru the frame with a nut on the back side.
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IMG_4025.jpg (148.51 KB, 95 downloads)

Last edited by klhansen; 09/02/2026 2:52 AM. Reason: added picture

Kevin
1951 Chevy 3100 work truck
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Jerry- Thats what I was thinking. I bet the right sized hole drilled in it with one of those retaining clips like the hoses use would work fine.
Khansen- That is the exact one. The line from the master is bigger than the other two. 1/4 and 3/16 maybe. A 7/16 wrench for the line from the master, and 3-8 wrench for the front and rear lines. Please let me know if you have one to spare.
Dan, I think that is the one from Jim Carter is correct!
Thank you sir. I’ll try and verify, but pretty sure.

Thank you all.


1952 5 window 3100
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Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
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Bill, I did go out and check, but that fitting is gone from my stash of stuff. I believe now that it got sent to another Bolter. Sorry.


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Joined: May 2026
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'Bolter
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I ordered the one from Jim Carter klhansen.
Thank you for checking.
As soon as it arrives I’ll try again. This time I’ll get everything started thread wise before the block is bolted to the frame. That has to be the biggest lesson learned from this. That’s a tight fit boxed into the corner of the frame rail like that.
It’s giving me more time to practice my double flare as well. I found that lubricating before the flaring process with a little brake fluid made a huge difference in the quality of flare. I also file and deburr. I bought a kit from Harbor Freight and it works fine.
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IMG_5930.jpeg (212.18 KB, 71 downloads)


1952 5 window 3100
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Bill
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Don't forget to slip the inverted flare nut onto the tubing BEFORE making the flare! It's embarrassing to have to cut off a really good double flare because there's no nut behind it!
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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'Bolter
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Originally Posted by Hotrod Lincoln
Don't forget to slip the inverted flare nut onto the tubing BEFORE making the flare! It's embarrassing to have to cut off a really good double flare because there's no nut behind it!
Jerry


I can't tell you how many times I've done the electrical wiring equivalent of that by making a splice without sliding the heat shrink tubing onto one of the wires first.


'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
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Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Joined: May 2015
Posts: 10,996
100% of us have made the missing nut/shrink tubing mistake at least once. LOL!


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Joined: Oct 2019
Posts: 300
1
'Bolter
'Bolter
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Only once? I wish.

Joined: May 2015
Posts: 10,996
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Joined: May 2015
Posts: 10,996
Originally Posted by 1955 1 Series
Only once? I wish.
I did say "at least once". wink I'm in the same boat as you are. not me


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.

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