Grade 8.8 high-strength reverse thread hex socket cap screws adopt premium carbon steel material with quenching treatment for enhanced hardness and mechanical performance. Features black oxide finishing and black Dacromet coating, providing excellent corrosion resistance, rust protection and wear resistance for long-term service in harsh working environments. Designed with cylindrical head and internal hex drive structure, equipped with left-hand reverse thread for special anti-loosening and disassembly requirements. Complete specifications cover M5, M6, M8 and M10, precision thread processing ensures tight fitting and stable assembly. Widely applied in mechanical equipment, mold assembly, precision machinery and industrial fastening scenarios. Factory supply with stable quality, ideal for global hardware purchasers and manufacturing enterprises.