What kind of bolts do I need for shocks, and struts?

Different grade bolts are used in different applications for good reasons. There are strength trade offs. Some bolts are shear resistant but lower in stretch resistance. Some are brittle and some are soft. Some will bend a lot without breaking, some will break before bending. I try to take advantage of the factory research when replacing bolts and all fasteners. I replace with the same grade whenever possible. Grade of a bolt is easily determined by the markings on the bolt head. A tiny bit of research will find this on the internet. Any grade bolt can be chromed, even aluminum. Just rely on the grade marks on the bolt head.