No, it's M9 x 1.25. I am not the only dufus to have done this. It's all over the forums for different cars. There are options, e.g., a Polaris speciality bolt, et cet. I am lucky because I removed so little material, that I am going the helicoil route tonight. Keep in mind that I have to keep the bolt shaft size down since the head has pre-bored holes and I am not messing with those no matter what. Worst case scenario is that I am forced to buy a Chinese clone 508SD compressor for my a/c. My gaskets should be here by Wednesday or Thursday, just in time for the 4th weekend. Poop !