Grade 10.9 Black Oxide Serrated Flange Hex Bolts M8 M10 High Tensile Heat Resistant Anti-Slip Industrial Screws Strong Torque

M8/M10:M816-M850,M1016-M1050Grade 10.9 high strength alloy steel, high tensile and shear strength for heavy industrial use.Serrated flange design provides excellent anti-slip and anti-loosening performance.Black oxide surface treatment, wear-resistant and durable in harsh environments.Good heat resistance, maintains stable performance under high temperature.High torque, not easy to break or deform under strong force.Integrated large flange pad, no additional washer needed, easy installation.Precise thread, tight fit, stable connection even under vibration.Widely used in machinery, automotive, construction and industrial equipment.

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