All,


I am installing a 2005 F250 diesel Super Duty brake master cylinder into a 79 crew cab project truck. I need to order the correct fittings for the brake line output ports. They don't appear to be SAE.


Does anyone know the correct fitting size for the front and rear ports?







Thanks,


Checksix

 

The newer MC most likely has I.S.O. metric (bubble flare) fittings. I can't tell from the photo but probable fittings sizes could be 10mm x 1.00 or 12mm x 1.00.

You could take the MC to the parts store and check it with some of the pre-fabbed lines, with metric bubble flare fittings on them, to figure out which fitting size matches the ports.