grade 8.8 bolt specification: 1Materials:Carbon steel 2Size:M24*80,27*130,30*270 ... ,Dacro 4Certificate:ISO9 Different types of grade 8.8 bolt specification Details of the product:1Materials: 1045, 45#, 40Cr, 35CrMoA, Q345D ... speed railway and now they are being used. We exported to world markets, such as U.S.A., Canada, Cuba, Germany ... Welcome your visit! Different types of grade 8.8 bolt specification