gi bolt 1.Grade: 4.8-12.9, A2, A4 2.Size: M4-M72 3.Finish:plain, zinc plated, hot dip galvanized, dacroment gi bolt 1.Grade: 4.8-12.9, A2, A42.Size: M4-M723.Finish:plain, zinc plated, hot dip galvanized, dacroment4.Material:Carbon steel, stainless steel5.Packing: Standard export packing or According to customer's requirement DIN931 half threaded gi bolt