Cobra Front Calipers

The bolts have fine threads compared to the rears. But I have heard 3 different stories, 1 being production date, which I cant find, 2 threads per inch, 3 mm per inch. I have 1 thread per mm and was told that was coarse, because 1.5 threads per mm was fine, damn I will tell you that 1 per mm is fine in my book!