... low carbon alloy steel,ML20MnTiB2.Property grade: 10.9S3.Surface treatment or finishing: plain, zinc plated, galvanized, yellow zinc plated ... from: M5 - M42 Length: 10mm-200mm Hexagon head bolt: Treatment: HDG, Zinc, Black... Carbon steel: Grade/class 4.8, ... refining and drilling industrydefence and commercial ship building industry Special high strength bolt with flange washer with CE certifation