Castle Nut

Welcome to the Castle Nuts category at MJ Anchor (Hebei DuoJia Metal Products Co., Ltd.), your premier manufacturer and global supplier located in Handan Yongnian, the heart of China’s fastener production industry. Drawing on the technical expertise of our predecessor, the Yonghong expansion screw factory, we produce a comprehensive range of castle nuts—primarily following DIN 935 (Slotted Nuts) and ANSI/ASME B18.2.2 standards—specifically engineered for safety-critical applications requiring absolute vibration resistance and positive locking. Our castle nuts feature a specialized turreted head with vertical slots designed to accommodate a cotter pin or safety wire, which passes through a hole in the mating bolt to mechanically prevent the nut from backing off. Precision-manufactured to comply with rigorous international standards, including GB, DIN, ANSI, and BS, these fasteners are essential for automotive wheel hubs, steering linkages, and heavy-duty axle assemblies. Fabricated from high-grade Carbon Steel or Stainless Steel (SS304/SS316), they are available in various strength grades, ranging from Class 8 and 10 to 12, to handle extreme mechanical stresses in high-torque environments. To guarantee long-term durability and protection against environmental corrosion, our products feature professional surface treatments such as White Zinc Plating, Yellow Zinc Plating, Hot-Dip Galvanization (HDG), and Black Oxide. With our advanced factory-direct production lines, we support custom manufacturing for non-standard slot dimensions, specialized turret heights, and unique thread pitches based on your specific engineering blueprints. MJ Anchor is committed to providing reliable, laboratory-tested fastening components that meet the safety and precision demands of modern global infrastructure. For bulk wholesale pricing, material test reports (MTC), or technical consultations, please contact our expert team at Nancy@mj-anchor.com