Come to think of it I did use 7075 Alum. So I did use aircraft grade Alum. HA HA. I'm with you Chris . Good enough for planes. I was out of titanium . So I guess all the raiser they sell on e-bay made from some polysomthing to stamped steel with grade 8 bolts are junk also. Agree about the leverage thing.
A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever.
At least I wasn't told how I should spend my money or save it.
Grade/Class
Strength
Metric Class 10.9
Similar to Grade 8.
Metric Class 12.9
The highest metric class for strength, it exceeds Grade 8.