sorry. 12.9 are mild. all the 8.8, 10.9, 12.9 designations are mild as stainless bolts are graded differently (a1-a5 (autensitic) and c1-c5? (martensitic))
the majority of my stainless xox's are A2 as i rarely need more than this and they get expensive quickly.
will have a root around for...