S-93604A645 5/16"-18 x 1 1/2" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ideal for outdoor and harsh industrial environments
• Exceptional tensile strength of 60,000 PSI ensures reliable load-bearing capacity and structural integrity
• Secure anti-rotation locking provided by the square neck design, preventing bolt spin during installation
• Wide rounded head profile distributes clamping force evenly and reduces surface damage
• Coarse UNC threading enables quick assembly and disassembly in wood and metal applications
• Class 2A thread fit guarantees consistent engagement and interchangeability with standard nuts
• Compliance with major industry standards including ASTM A307, ASTM A153, and ASME B18.5 for quality assurance

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt is engineered to address critical challenges in construction, agricultural equipment, and structural framing. The Grade 2 material with Rockwell B70 hardness provides optimal durability against shear and vibration, while the fully threaded 5/16"-18 UNC coarse thread ensures deep penetration in wood and soft metals. The square neck securely locks into pre-drilled holes, eliminating rotation during torque application—saving installation time and reducing fastener failure. Its 60,000 PSI tensile strength makes it suitable for high-stress connections in trailers, fencing, and machinery, where corrosion resistance and long-term reliability are paramount.

Specification Summary & Compliance

This carriage bolt features a 1 1/2" length with Class 2A thread fit and UNC coarse threading per ASME B18.5. It meets ASTM A307 for low-carbon steel bolts and ASTM A153 for zinc coating specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.