Brake fittings - how tight?

[Mark B]

I am bending up some new brake lines with new fittings to the master cylinder and prop valve. How tight should the flare nuts be installed? Is there a torque spec? Do repeated tightinings of the fittings do any damage to the pipe flares?

thanks
mark

[Alex Hayley]

As tight as it takes to stop a leak. Repeated tightening of the nuts is not an issue. In fact, it is a good idea to tighten and loosen a few times to have the flare fittings form to each other. I used stainless steel fittings and tube and had a few fittings I tightened so tight I thought the fittings were going to crack but they did not and the leaks were fixed.

[1968CHEVYC10]

Yeah I've never had problems with fitting stripping out, just make sure you get it im straight, also flare nut wrenches if you don't already have them are a lifesaver, I didn't have any when I did my brake so all the leaky spots have marks on them from the vice grips haha