Guys, I checked my my fastener place here in BA (
http://www.schrauben-profi.de/start.htm). Normally they have never let me down - until today. They don't have this bolt!
They said they've never seen such wierd dimensions on a fastener. And the guy said to me... "good luck" finding a bolt like that! lol I suspect this bolt might be a custom one off spec for bmw/brembo.