Bleeder screw thread pitch?

[lucidmatt]

OK so in the ongoing quest to bring this lady back to fighting form, the next task is ridding the car of the spongy brake feel, and getting some aggressive street pads installed before the OEM pads score the rotors to hell with their "wear indicators". fluid, lines, etc. are already sourced, but one item eludes me. I've already STFA and googled the hell out of this question but I can not find a definite answer to what the thread pitch is for the rear caliper bleeder screws. Some sources have said they're M7x1, others M10x1.5, I cant find a definitive answer for the RS rear calipers. I have found numerous sources saying the fronts are M10x1, which makes sense since this was the same as the Brembos I installed on my old car. Anyone know the thread pitch for the rears? TIA

Oh, and I'm replacing these because to my horror, taking off the bleed screw caps I discovered they had rusted to oblivion down to the shoulder of the hex head. Horrifying.

[wednesday]

Is that bleeder screw that you removed in a condition decent enough where few threads can be used? If yes, then take that down to the closes automotive parts store - Oreilly/AdvanceAuto/Napa/AutoZone/..etc and they usually carry a thread/pitch measuring tool. I have also taken mine to the local Ace hardware store and use the measuring scale to figure out which ones..

Below link didn't clearly say front or rear.. but let me paste it below..

https://www.ecstuning.com/Audi-B7_RS4--V8/ES427848/

[koolade9]

I don't have your answer, but M10 would be way too big. I'd say the M7 is much closer in size. Like Wed said, pull one and take it to an auto parts store, they'll have what you need.