S-93604A721 1/2"-13 x 4" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ensuring long-lasting performance in harsh outdoor or industrial environments.
• Enhanced anti-rotation security due to the integrated square neck design, which locks securely into materials to prevent spinning during tightening.
• Reliable load-bearing capacity with Grade 2 strength and 60,000 psi tensile strength, suitable for medium-duty structural and machinery applications.
• Easy and quick installation with fully threaded UNC coarse threading and right-hand direction, allowing for efficient assembly in wood or metal.
• Consistent dimensional accuracy with Class 2A thread fit, ensuring smooth engagement and reducing the risk of cross-threading.
• Durable mechanical properties featuring Rockwell B70 hardness, providing resistance to wear and deformation under stress.
• Broad compliance assurance meeting ASTM A307, ASME B18.5, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt is engineered to address common industrial challenges, such as corrosion in exposed settings and loosening under vibration. The square neck design effectively counters rotation during installation, making it ideal for wood-to-metal connections in construction, agricultural equipment, and transportation frameworks. Its Grade 2 strength and UNC coarse threading ensure robust performance in applications requiring reliable fastening without frequent maintenance. By combining 60,000 psi tensile strength with a protective zinc coating, this bolt minimizes failure risks in heavy-duty scenarios, from machinery assembly to outdoor structures, while adhering to key industry standards for consistent quality and safety.

Specification Summary & Compliance

This carriage bolt maintains precise dimensions, including a 1/2"-13 UNC coarse thread with Class 2A thread fit for accurate engagement. It conforms to manufacturing specifications under ASTM A307 and ASME B18.5, ensuring reliable performance in industrial fastening. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and restricted substance control.