Originally Posted by Mike

M10x1.0, but I think they are a waste of money. If you are trying to do it by yourself, you will still have to be inside the car pumping the brakes and won't know when all the air has come out of the system, since you can't see it. If you have two people, then you still don't need them, just a small piece of tubing to see the bubbles.

If you are doing it by yourself, I highly recommend a motive bleeder. that makes it truly a one person operation. Also, if you go this route, we use the Ford cap adapter.