Before I purchased my all thread. I looked at Grade 8.8, Grade 10 and Stainless.
WHile stainless seems to do better with aluminum, the Grade 8.8 seem better than Grade 10. I can't remember now why. I think the tensile strength of 8.8 was not as good but 10 was more brittle. Stainless and Grade 8.8 are about even.