DIN 933/ISO 4017 Grade 8.8 Hexagon Head Bolt for high-strength structural connections. Manufactured from medium carbon steel, quenched and tempered to achieve minimum tensile strength of 830 MPa. Available in sizes M6 through M64, with thread lengths per DIN 933 standard. Surface finishes include zinc plated (blue/white/yellow), hot-dip galvanized, and geometrical. Each batch is tested for hardness, tensile strength, yield strength, and impact properties. Perfect for steel structures, heavy machinery, bridges, and wind tower applications.