Are the metal brake lines in a metric size or standard ?

[stevenmichael]

I was going to order this kit from amazon but I wanted to make sure it would work . The sizes of the flare tool are 3/16", 1/4", 5/16", 3/8" and 1/2” standard sizes . Is the lines on the lx450 metric or standard ? Will this tool work for my brake lines ? Thanks . Amazon.com: Brake Line Flaring Tool Kit, 3/16", 1/4", 5/16", 3/8" and 1/2” Double & Single Tubing Flare Tool for Copper and Aluminum Fuel Line Tube : Automotive - https://www.amazon.com/Flaring-Double-Single-Copper-Aluminum/dp/B0DKCVSZK9/ref=sr_1_8?crid=1Z0AIBOU8E5QU&dib=eyJ2IjoiMSJ9.zj5gI-t_ISBtfoS-aoWE8LGXQnxAcyryQ97U6mESiPIjTLiCy5drf0z1mY1JOdYimRvrJguE51Y0u7kqPKhoHQpMLzKlcyEZeFcqmoWmLwVxbdT_zjq6-nA8m4HAmiI5C5CYNTI0aB5Q1RLroDpvM7vkd6-PxwxzhpastykzOZa_08A5V4UxI7Z45sx_ryBEGK2y8nhT2TMo-kwiauhnhMq2pNsaX3sFuCHXsaYaeiYdhWI3zSVGgiJKhBZGKtU9U3o64Q7mywBdeCwj1l_8Vd6f8jJDioP13-1Wye8Q94A.cUCj0HR--8Th1RiTSzwJ-fHGusWteV97VNsbKbwvnZY&dib_tag=se&keywords=double+flare+break+flare+tool&qid=1751447030&sprefix=double+flare+break+flare+tool+%2Caps%2C119&sr=8-8 I found this metric one at Auto zone . OEMTOOLS Metric Double Flaring Tool Kit - https://www.autozone.com/test-scan-and-specialty-tools/tube-flaring-tool/p/oemtools-metric-double-flaring-tool-kit/69340_0_0

 

[joecrow]

Pretty sure they're metric. Take a look through this thread.

Question about brake line fittings, cutting and flaring

Getting ready to ditch the LSPV in place for a manual proportioning valve up near the master cylinder in the engine bay. I plan to reuse what I can from the stock lines and fittings but I'm a little confused about the types of flare nuts used. From my research, it appears we have brake lines...

forum.ih8mud.com

 

[Irish Reiver]

The replacement brake pipe i used was rwgular 3/16 copper/nickel but the flare ends i used were metric (M10x1)

 

[Marvelicious]

I was going to order this kit from amazon but I wanted to make sure it would work . The sizes of the flare tool are 3/16", 1/4", 5/16", 3/8" and 1/2” standard sizes . Is the lines on the lx450 metric or standard ? Will this tool work for my brake lines ? Thanks . Amazon.com: Brake Line Flaring Tool Kit, 3/16", 1/4", 5/16", 3/8" and 1/2” Double & Single Tubing Flare Tool for Copper and Aluminum Fuel Line Tube : Automotive - https://www.amazon.com/Flaring-Double-Single-Copper-Aluminum/dp/B0DKCVSZK9/ref=sr_1_8?crid=1Z0AIBOU8E5QU&dib=eyJ2IjoiMSJ9.zj5gI-t_ISBtfoS-aoWE8LGXQnxAcyryQ97U6mESiPIjTLiCy5drf0z1mY1JOdYimRvrJguE51Y0u7kqPKhoHQpMLzKlcyEZeFcqmoWmLwVxbdT_zjq6-nA8m4HAmiI5C5CYNTI0aB5Q1RLroDpvM7vkd6-PxwxzhpastykzOZa_08A5V4UxI7Z45sx_ryBEGK2y8nhT2TMo-kwiauhnhMq2pNsaX3sFuCHXsaYaeiYdhWI3zSVGgiJKhBZGKtU9U3o64Q7mywBdeCwj1l_8Vd6f8jJDioP13-1Wye8Q94A.cUCj0HR--8Th1RiTSzwJ-fHGusWteV97VNsbKbwvnZY&dib_tag=se&keywords=double+flare+break+flare+tool&qid=1751447030&sprefix=double+flare+break+flare+tool+%2Caps%2C119&sr=8-8 I found this metric one at Auto zone . OEMTOOLS Metric Double Flaring Tool Kit - https://www.autozone.com/test-scan-and-specialty-tools/tube-flaring-tool/p/oemtools-metric-double-flaring-tool-kit/69340_0_0

I can't speak to the 80 lines, but I'm having uncomfortable flashbacks to the last time I used a tool like that. I don't know... maybe the one I got was just junk, but I'm prejudiced against that style entirely.

SuperFastMatt has a good brake line video, though I'm still not sure it solves your metric or standard quandry. Next time I have to do hard lines, I'll be picking up the tool he uses.

 

[Godwin]

I've just replaced and built new lines on my 80 using 3/16" copper line from Fedhill

Federal Hill Trading Company

Cunifer is seamless, copper nickel alloy DOT approved brake line used for OEM and replacement brake lines, fuel lines, power steering and cooling lines. Corrosion proof and easy to install high pressure hydraulic tubing for the harshest environments.

store.fedhillusa.com

I used this flare tool Eastwood Professional Brake Line and Tubing Flaring Tool - https://www.eastwood.com/professional-brake-tubing-flaring-tool.html but you need a vice to hold it and it may be available cheaper through other vendors. You use the 4.75 mm dies.

After I cut the line I use a deburring tool to clean the end Eastwood Tubing Deburring Tool - https://www.eastwood.com/eastwood-tubing-deburring-tool.html

Finding 10 mm nut size brake line fittings of quality was a challenge Good source for brake line fittings? - https://forum.ih8mud.com/threads/good-source-for-brake-line-fittings.1361936/ I bought a selection from @cruisermatt

 

[landtank]

I use this tool and carry it on trail runs.
double flare tool
Easy to get perfect double flares and can be done with only 2 hands.

And use these nuts
brake line nuts

 

[CharlieS]

I've just replaced and built new lines on my 80 using 3/16" copper line from Fedhill

Federal Hill Trading Company

Cunifer is seamless, copper nickel alloy DOT approved brake line used for OEM and replacement brake lines, fuel lines, power steering and cooling lines. Corrosion proof and easy to install high pressure hydraulic tubing for the harshest environments.

store.fedhillusa.com

I used this flare tool Eastwood Professional Brake Line and Tubing Flaring Tool - https://www.eastwood.com/professional-brake-tubing-flaring-tool.html but you need a vice to hold it and it may be available cheaper through other vendors. You use the 4.75 mm dies.

After I cut the line I use a deburring tool to clean the end Eastwood Tubing Deburring Tool - https://www.eastwood.com/eastwood-tubing-deburring-tool.html

Finding 10 mm nut size brake line fittings of quality was a challenge Good source for brake line fittings? - https://forum.ih8mud.com/threads/good-source-for-brake-line-fittings.1361936/ I bought a selection from @cruisermatt

I though copper brake lines were a no go?

 

[Marvelicious]

I though copper brake lines were a no go?

What he linked is copper-nickel alloy, which is perfectly acceptable and excellent to work with. Straight copper is definitely not recommended.

 

[stevenmichael]

I've just replaced and built new lines on my 80 using 3/16" copper line from Fedhill

Federal Hill Trading Company

Cunifer is seamless, copper nickel alloy DOT approved brake line used for OEM and replacement brake lines, fuel lines, power steering and cooling lines. Corrosion proof and easy to install high pressure hydraulic tubing for the harshest environments.

store.fedhillusa.com

I used this flare tool Eastwood Professional Brake Line and Tubing Flaring Tool - https://www.eastwood.com/professional-brake-tubing-flaring-tool.html but you need a vice to hold it and it may be available cheaper through other vendors. You use the 4.75 mm dies.

After I cut the line I use a deburring tool to clean the end Eastwood Tubing Deburring Tool - https://www.eastwood.com/eastwood-tubing-deburring-tool.html

Finding 10 mm nut size brake line fittings of quality was a challenge Good source for brake line fittings? - https://forum.ih8mud.com/threads/good-source-for-brake-line-fittings.1361936/ I bought a selection from @cruisermatt

What size line is used in the 80 series ? Metric or standard size ? What type of double fare is used ? iIs it a sae inverted double flare or the Din bouble flare ? Thanks

 

[stevenmichael]

I use this tool and carry it on trail runs.
double flare tool
Easy to get perfect double flares and can be done with only 2 hands.

And use these nuts
brake line nuts

Okay I really like that setup . So it looks like it can make 2 different double flares , Which one do I need to us ? Is the 3/16 - 4.75 mm the correct tube size that fits inside it for the 80 series ? What size tube is used in the 80 series Metric or standard ? It seems 3/16 and 4.75 mm are interchangeable is that correct ? I want to keep this tool with me in the truck also along with some extra tubing and some m10-1.0 fittings and connection piece so I can cut and replace a hole in the line if need be . Do you know what piece I would need to connect 2 m10-1.0 male ends into ? I found this unions on amazon . It says

• For 3/16" tube
• 10 x 1mm Threads
• Using Inverted Flare fittings . Is a double flare the same as a inverted flare ? Will these unions be the ones I need to connect to 10x1mm males together ? Thanks

Amazon.com: The Stop Shop Inverted Flare Unions for 3/16" Tube with 10x1mm Threads (Pack of 2) : Automotive - https://www.amazon.com/Inverted-Flare-Unions-10x1mm-Threads/dp/B01N6ZWCAR/ref=sr_1_22_sspa?crid=EPVYRBXBETX0&dib=eyJ2IjoiMSJ9.IYfAjKibKGziNSKZoylfBwyEcf0EsGkTN0FRwcQOJ059_J9-ftYnEcaWbOAxL-JUsnShmCiP3rDd1FkJjkjeWXdqRvkNwWX2LhGCidYICjTb3TDXUtd8ZvPFSMjCuJhRBZYEmOeETOSQpoXQS4PSgehtZCncP1gVlBdBc24GK4mt5BK7J2I_g30nHgPXbIvLVohKydyRZl3azvEIZ3ujAwM-m_0Gm5tp4f1yxcbSH5I.4r1VWBDOm6fp_Yi4_yataUpeua1WsdJjqf_5Lj5Fvz4&dib_tag=se&keywords=10x1mm+union+for+brake+line&qid=1751519927&s=industrial&sprefix=10x1mm+union+for+brake+line%2Cindustrial%2C124&sr=1-22-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9idGY&psc=1

 

[landtank]

You slide the tube into the handle into it hits the stop. Then remove the stop and use the end of the die that expands the tube to create the bulge. The use the other end of the die to crush and form the double flare.