grade 8.8 bolt specification: 1Materials:Carbon steel 2Size:M24*80,27*130,30*270 3Surface:Black,Zinc,Dacro 4Certificate:ISO9 Different types ... of grade 8.8 bolt specification Details of the ... product:1Materials: 1045, 45#, 40Cr, 35CrMoA, Q345D, etc. 2Size: M24*80,27*130,30*270 3Standard ...