Zinc Plated, 8.8 SteelDIN 912ISO 4762Master Assortment Kits are Available. Click HereClick Here for Technical Data SheetM22 Socket Cap Screws 8.8 Steel, Zinc PlatedLengthSelectQuantityContact Us to PurchaseAlso available in these materials 12.9 Steel A2 Stainless Steel A4 Stainless Steel Nylon Also available these finishes Black Zinc Flake Variations Also available vented (slotted or center) in A2 Stailess Steel