Brake line union sizes

[Zep5.0]

Can anyone confirm the M10X1.0 and M12X1.0 ports on the master cylinder in my 91 are also the same size as the fittings where the rear brake lines join below the firewall? The reason I ask is the braided lines I found have 7/16x24 fittings. That's making me debate what the test of the fittings are

I'm bending new lines for the front of my car and those that join to the rear lines. Having a hard time finding 3/16" line with M12 fittings. I wouldn't have 6mm line, would I?

 

[MadMikeyL]

I can’t say for sure what size all the fittings are, but if you want it to look nice, buy one of these, and be able to easily make any flares or fittings you need.

Amazon.com

 

[Zep5.0]

I can’t say for sure what size all the fittings are, but if you want it to look nice, buy one of these, and be able to easily make any flares or fittings you need.

Amazon.com

That's a sweet unit. I must say after this, I'm not looking to do any brake line work. I wish I would have dropped the car off at a shop before I installed the engine. I'm fairly certain my nephew has a flaring tool, and it's his shop in using. I think at this point I'm just cutting and reusing the fittings from the front half of my parts car.