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 ... honorary certificates:3.products:Zinc, Black, Dacron grade 8.8 hex bolts4. Factory view figures: ...