I was installing new SS brake lines and then the. Hard brake line nut rounded off and I have no idea what to do!

 

well the right thing to do would be to cut off the section of pipe get a new nut, flair the pipe and your good as new.

the cheap easy way is to us a pair of vise grips and tighten it on....

 

I would be concerned that you may have cross-threaded the connection, which is not good and may require replacement of more than just the line.

 

Were you using the correct wrenches for the brake line? I feel your pain though... cause last year sometime I did the same thing on my Subaru Legacy GT except I actually snapped the hard line in half. About 10 different trips to Advance auto parts later, countless cursing, and 3 days later I finally got the car rolling (and even then.. it was kinda ghetto). The vice grip idea is prolly your best bet though. Otherwise I would just take it someplace and let them deal with it. Brake lines suck!! Once you snap the hard line.. knowing our cars..your have to go to Mini/BMW and buy the entire pack of hard brake lines.. which for my Subie was around 225 bux. And they didnt just carry the 1 line I needed. Then routing it back can be a nightmare as well. I could go on and on and on... I'm just trying to stop what was a pure nightmare for me happen to you.

 

Thanks for the save lol, I ended up using cured Vice grips that clamped... I ended up having to use my whole body weight to turn it.. Who ever did the original line... (Enough said)

 

Good lesson learned about using a crescent open end, or adjustable wrench here. If you don't have a brake wrench, semi closed ended, go get one when changing brake pads, etc.

 

Oh, I was using the 11m flare nut wrench. All the others were fine. The one was torqued ridiculously.