[BillC]

Originally Posted by smdubovsky

Thanks for the info. I've found pics of brake bolts for later 911s (~2015) in a longer M12x115 that definitely show triple square heads. So I'm not writing off the idea that Porsche uses all three head styles depending on their mood and not wanting users to service their own cars.

Do the black ones appear to rust easily? If it was a simple black oxide coating they'd get ugly in a hurry. I'd hope Porsche is using some sort of black cosmetic coating over some other rust preventative coating.

You have 8 you want to get rid of? I'm going to cut them down to 30-35mm so they can be ugly on the far end where they were threaded in the uprights originally.

The black-coated bolts don't seem to rust very easily. I have some that were on the car for a couple of years and still look nice.

Edit:
I went and checked the "stash". I pulled out the 8 nicest-looking zinc bolts for you. I have 4 black oxide bolts that would work, since they are full-thread. The other black oxide bolts are only partially threaded, so they probably won't work. And, the other zinc bolts look like your second pic, but not quite as bad.