M6*28.8 High Carbon Steel Square Head Bolt

Product Advantages
Square Head Wrenching Stability: The four-sided square head design provides a large wrench contact surface, allowing maximum torque application and preventing tool slippage during assembly or disassembly.
High Carbon Steel Structural Integrity: Forged from high carbon steel to ensure exceptional core hardness and high tensile strength under heavy mechanical stress and continuous operational loads.
Black Phosphate Surface Protection: Treated with a durable black phosphate coating that delivers superior wear resistance, anti-galling performance, and dependable corrosion protection for industrial environments.
Automotive Assembly Suitability: Engineered specifically for automotive non-critical component installation, offering precise dimensional accuracy and reliable joint clamping stability.

Factory Advantages
Tailored B2B Manufacturing: As a direct fastener plant, we support complete OEM/ODM customization, adjusting thread lengths, head dimensions, material grades, and surface coating treatments according to your exact technical requirements.
End-to-End Quality Management: We control all production processes in-house, including raw material testing, cold forging, heat treatment, and surface finishing, ensuring high batch-to-batch consistency and reliable lead times.