i bought a MBA cover and when i tryed to install it the alan head bolts they gave me messed up the factory bolts holes and the screws they gave me. so i need to retap the holes and need to know the size of the bolt and thread gauge... example of what i mean, like M6-1.25. thanks its like the bolts they gave me were the wrong size or something?? factory bolts went in and came out easy.

 

I know this is a bit late compared to when this thread was started however I am posting incase anyone else searches for this info... I replaced my radiator shroud bolts this weekend and the size is M6-1.0x25mm I bought a package from NAPA under the "Balkamp" brand name, part # is 665-1149.