Hex head bolt 1.Grade: 4.8 -- 12.9,A2, A4 2.Size: M3-M72 3.Finish:plain, zinc plated, hot dip galvanized, dacroment Hex head bolt1.Grade: 4.8 -- 12.9,A2, A42.Size: M3-M723.Standard:DIN931/933.....3.Finish:plain, zinc plated, hot dip galvanized, dacroment4.Material:Carbon steel, stainless steel6.Delivery time:30days after order confirmation zinc plate DIN931 Hex head bolt