Here is the English translation:
Material: Carbon steel
Strength grades: 4.8, 8.8, 10.9, 12.9
Surface finishes: Plain / natural, blue-white zinc plated, yellow zinc plated, hot-dip galvanized, tempered blackened, Dacromet
High-strength blackened button head socket cap screw. Made from high-quality carbon steel substrate and professionally blackened. Rust-resistant, wear-resistant, and non-reflective with a matte finish. The hex socket design provides ample torque, suitable for automated assembly. Cost-effective. Suitable for basic fastening applications such as automotive components and heavy machinery.