expansion bolt 1.Grade: 4.8, A2, A4 2.Size: M6-M24 3.Finish:plain, zinc plated, hot dip galvanized, dacroment expansion bolt 1.Grade: 4.8, A2, A42.Size: M6-M243.Finish:plain, zinc plated, hot dip galvanized, dacroment 4.Material:Carbon steel, stainless steel5.Packing: Standard export packing or According to customer's requirement High strength expansion bolt