S-93548A812 5/8"-11 x 4 1/2" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior Anti-Rotation Performance: The integrated square neck design securely locks into materials, preventing the bolt from turning during installation and ensuring reliable, vibration-resistant connections.
• Enhanced Corrosion Resistance: The zinc-plated steel construction provides a durable protective barrier, extending the bolt's service life in various environmental conditions.
• High Tensile Strength for Demanding Applications: With a tensile strength of 60,000 psi, this bolt is engineered to handle significant stress and load, making it suitable for heavy-duty structural fastening.
• Optimized for Easy Installation: The coarse UNC thread and Class 2A fit allow for quick and straightforward assembly, reducing installation time and labor costs.
• Consistent Material Hardness: A Rockwell B70 hardness rating ensures the bolt maintains its shape and integrity under pressure, preventing deformation and ensuring long-term reliability.
• Broad Industrial Compliance: Manufactured to meet ASTM A307, SAE J429, and ASME B18.5 standards, guaranteeing consistent quality and performance for professional engineering applications.
• Environmentally Responsible Manufacturing: Full compliance with RoHS 3 and REACH regulations ensures the product is free from hazardous substances, supporting sustainable and safe industrial practices.

Professional Applications & Engineering Value

This Grade 2 zinc-plated steel carriage bolt is engineered to address common industrial challenges such as joint loosening due to vibration and material corrosion in harsh environments. The square neck design is a key feature that bites into wood or metal, providing exceptional anti-rotation performance essential for structural frameworks, machinery assembly, and transportation equipment. The zinc plating offers a cost-effective layer of corrosion resistance, making it ideal for outdoor applications, agricultural machinery, and construction projects where exposure to moisture is a concern. With a coarse UNC thread and Class 2A fit, it ensures quick, secure fastening in soft materials like timber, reducing installation errors and maintenance needs. Fully threaded for versatile grip length adjustment, this bolt delivers reliable, long-lasting connections in heavy-duty industrial settings.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and adheres to UNC coarse thread standards (5/8"-11), ensuring dimensional accuracy and compatibility. It is manufactured in compliance with ASTM A307, SAE J429, and ASME B18.5 specifications, guaranteeing consistent performance and safety. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted hazardous substances and safe for industrial use.