I'm trying to replace the rear brake pads and rotors on my 2013 VW Jetta TDI and I'm completely baffled by what type of screw this set screw or alignment screw is in the rotor face. It's 6-pointed so im guessing it's a Torx but I have tried T25 which is too small and T27 is too big. There isn't a T26. VW service departments tell me it's a T30 but there is no way. T27 is to big! Any help would keep me from blowing up this stupid car!
Picture of screw: