There high tensile bolts,
i've replaced almost every bolt in my engine bay with them, and loads on the rest of the car.
except internal nuts and bolts. As some of these need to be stretch bolts, or specialised nuts and bolts.
If I remember right the strut bolts are M12.
A little tip paint the head on the black ones. As you may find the head rust, as there only chemically blacken. Not zinc coated like original bolts. And used copper grease on the thread to stop that from rusting.
You can get them in different strength bolts as well.
4.8 high ten