Carriage Bolt

Welcome to the Carriage Bolts 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. Leveraging the deep technical expertise of our predecessor, the Yonghong expansion screw factory, we produce a comprehensive range of carriage bolts—primarily following DIN 603 and ANSI/ASME B18.5 standards—specifically engineered for timber-to-timber and timber-to-metal connections. Our carriage bolts feature a smooth, rounded dome head and a specialized square neck design that self-locks into the base material, preventing rotation during installation and providing a secure, tamper-resistant finish for fencing, outdoor furniture, and structural framing. Fabricated from high-grade Carbon Steel or Stainless Steel (SS304/SS316), these fasteners are available in various strength grades, such as 4.8 and 8.8, to meet both decorative and structural load requirements. To guarantee long-term durability and protection against environmental corrosion in outdoor settings, we provide professional surface treatments including Hot-Dip Galvanization (HDG), Yellow Zinc Plating, and White Zinc Plating. With our advanced factory-direct production lines, we support custom manufacturing for non-standard lengths, specialized thread pitches, and unique head dimensions based on your specific engineering blueprints. MJ Anchor is committed to delivering reliable, laboratory-tested fastening components that satisfy the most demanding safety standards of modern global construction. For bulk wholesale pricing, material test reports (MTC), or technical consultations, please contact our expert team at Nancy@mj-anchor.com