Brake Line Clarification
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Senior User
Joined: Oct 2014
Posts: 192
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From: Fremont, California
Brake Line Clarification
Hello FTE
I'm going to be running some new brake lines on my frame and I want to get an idea about AN fittings. I'll be using 3/16 line. I've always used a double flare, but I know some flex line kits use -3AN fittings. Are they able to be mated together. (3/16 double flare hard line to a -3AN flex line?)
I'm not too sure, just trying to find some information on this. I know the double flare uses a 45 degree flare and AN are 37 degree. If not compatible, any recommendations where I can get some fittings that would easily make it possible or the correct words I should look for in the descriptions?
I'm looking to use Nickel copper lines. I'm going to buy a bulk from summit racing and make the lines myself while my frame is sitting bare.
Any feedback is appreciated!
I'm going to be running some new brake lines on my frame and I want to get an idea about AN fittings. I'll be using 3/16 line. I've always used a double flare, but I know some flex line kits use -3AN fittings. Are they able to be mated together. (3/16 double flare hard line to a -3AN flex line?)
I'm not too sure, just trying to find some information on this. I know the double flare uses a 45 degree flare and AN are 37 degree. If not compatible, any recommendations where I can get some fittings that would easily make it possible or the correct words I should look for in the descriptions?
I'm looking to use Nickel copper lines. I'm going to buy a bulk from summit racing and make the lines myself while my frame is sitting bare.
Any feedback is appreciated!
More Turbo
Joined: Nov 2004
Posts: 555
Likes: 5
From: Marysville, WA
I used nickel copper lines from advance auto and stainless fittings.
NiCopp NiCopp Nickel/Copper Brake Line Tubing Coil, 3/16" x 25' CNC-325: Advance Auto Parts
I would not do anything other than 45 degree double flare. Mostly because I do not know otherwise but perhaps if anything fails on your braking system to cause an accident you could be liable for using the wrong/not apporved parts.
NiCopp NiCopp Nickel/Copper Brake Line Tubing Coil, 3/16" x 25' CNC-325: Advance Auto Parts
I would not do anything other than 45 degree double flare. Mostly because I do not know otherwise but perhaps if anything fails on your braking system to cause an accident you could be liable for using the wrong/not apporved parts.
Cargo Master
Joined: Aug 2014
Posts: 2,594
Likes: 72
From: North Central Arkansas
There are special nuts and backup sleeves to connect the hard line to AN 37 degree flare, the tube must be flared at 37 degrees. There may also be conversion fittings to go from 45 degree double flare to AN. Speedway, Summit and probably JEGS have some DOT approved AN brake hoses and fittings. Not all of the AN components are DOT approved, but their catalogs do mention whether the part is approved or not.
Mark
Mark
Senior User
Joined: Apr 2015
Posts: 459
Likes: 5
From: Buffalo NY
Like mentioned, they are not compatible. If you are using hard line down the frame there really wouldn't be any reason to use AN flares and fittings. For instance, if you use -3 AN style flexible stainless braided hose section to a caliper or front drum you can get a fitting that will accept the -3AN from the flex line and connect to a 3/16 - 24 standard hardine fitting like this Keyser Manufacturing Brake Fittings 100 43FM1032403 - Free Shipping on Orders Over $99 at Summit Racing. They mount to a steel tab that bolts or welds to your frame.
Edit- What works easiest for me is to go to Summit and type "Brake fittings" in the search bar. It will give a box to narrow down the choices. You can enter fitting 1 style and fitting 2 style, then pick the sizes for either. It's pretty helpful.
Edit- What works easiest for me is to go to Summit and type "Brake fittings" in the search bar. It will give a box to narrow down the choices. You can enter fitting 1 style and fitting 2 style, then pick the sizes for either. It's pretty helpful.
Thread Starter
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Senior User
Joined: Oct 2014
Posts: 192
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From: Fremont, California
I really appreciate all the help! I just want to make sure there are no issues especially with brakes. I'll look into making sure my flex lines and AN fittings from the flex lines are properly mated using an adapter. 
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Cheggie
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 3, 2013 11:30 AM
