Made from Grade 10.9 alloy steel, quenched and tempered to achieve extreme strength and high fatigue resistance, ideal for critical, high-stress applications; Features a black oxide finish that provides moderate corrosion resistance, reduces light reflection, and acts as a lubricating layer to prevent thread seizing during installation
Vibration-Proof Performance: The serrated flange withstand extreme shocks and dynamic loads; Hexagonal head design with wide bearing surface for secure wrench/socket grip, minimizing stripping risks
Their exceptional strength and locking flange make them ideal for automotive suspensions, engine brackets, and brake systems; industrial machinery, motor mounts, and conveyor assemblies; structural fabrication, metal framing, and outdoor enclosures; as well as demanding DIY projects like trailer building and farm equipment repair