High Strength Bolt 1.Grade: 8.8-12.9 2.Size: M6-M52 3.Finish:plain, zinc plated, hot dip galvanized, dacroment High Strength Bolt1.Grade: 8.8-12.92.Size: M6-M523.Finish:plain, zinc plated, hot dip galvanized, dacroment4.Material:Carbon steel5.Packing: Standard export packing or According to customer's requirement high strength structural hex bolt