High-strength structural bolts according to EN 14399-4, property class 10.9. Designed for preloaded joints in HV systems and manufactured per ISO 898-1. Available in plain or hot-dip galvanized versions. All bolts are CE-marked and supplied with EN 10204 3.1 certificates for full traceability and quality assurance. Suitable for steel structures and industrial applications where high strength is required.