2nd Gen 2WD Brake line size and flare nut size

[tekjones1983]

I need to replace all my hard brake lines what size is the hard lines and metric size of the flare nuts? I want to use the copper brake lines as a replacement. I have a 1994 mighty max 2wd truck.

[SubGothius]

Copper is unsuitable for automotive use, as it work-hardens from vibration, leading to cracks. Copper-nickel (aka cupronickel) alloys are what you want, such as the Cunifer brand.

[camoit]

I would reuse the double flair nuts. I have never had a double flair tool in metric.

[tekjones1983]

Ok I appreciate it. What is the size of our brake lines?