M2/M3/M4 10.9 grade high strength hair black round head inner plum blossom screw carbon steel pan head plum blossom groove screw for Machinery & Electronics

Material & Strength: Crafted from high-quality carbon steel with 10.9 grade high tensile strength, featuring black oxide (hair black) surface treatment for enhanced anti-rust, wear resistance and corrosion resistance, ensuring durability in industrial and mechanical scenarios.
Design & Operation: Pan (round) head design with inner Torx (plum blossom) groove, providing better torque control and avoiding slipping during installation; precise thread processing ensures tight fit, stable connection and no loosening during long-term use.
Size Specification: Available in M2, M3, M4 sizes, compatible with standard Torx tools, meeting diverse assembly needs for small precision equipment, machinery and DIY projects.
Application Scenarios: Widely used for machinery assembly, precision equipment fitting, mechanical repair, electronic device installation and DIY projects, suitable for professionals, industrial production and daily use.
Quality Assurance: Strict quality control, consistent dimensions, smooth surface (no burrs), strong load-bearing capacity, compliant with industrial standards, reliable for long-term use and batch purchase.

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