grade 8.8 bolt specification: 1Materials:Carbon steel 2Size:M24*80,27*130,30* ... ,Dacro 4Certificate:ISO9 Different types of grade 8.8 bolt specification Details of the product:1Materials: 1045, 45#, 40Cr, 35CrMoA, ... got the Production Permission License from the Ministry of Railways, P.R.China. 2.From 2006, we have manufactured the products ... your visit! Different types of grade 8.8 bolt specification