S-90185A154 5/8"-11 x 4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength and Grade 5 classification for reliable performance in demanding applications
• Superior anti-rotation security thanks to the integrated square neck design that prevents spinning during installation and use
• Enhanced corrosion resistance through black-oxide steel coating, extending service life in industrial environments
• Optimized thread engagement with coarse UNC threading and Class 2A fit ensuring quick assembly and vibration resistance
• Wide bearing surface distribution from the rounded carriage head design that minimizes surface damage to connected materials
• Full-threaded versatility allowing for maximum adjustability and secure fastening across the entire bolt length
• Regulatory compliance assurance meeting ASME B18.5, SAE J429, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

These Grade 5 carriage bolts deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The black-oxide steel construction provides essential corrosion protection for outdoor equipment, agricultural machinery, and construction applications where environmental exposure is a concern. The square neck design effectively solves the common problem of bolt rotation during tightening, ensuring secure fastening in wood-to-metal and structural steel connections. With 5/8"-11 UNC coarse threading, these fully threaded carriage bolts offer superior pull-out resistance in soft materials while maintaining the strength needed for heavy-duty industrial assemblies. The combination of Rockwell C25 hardness and 120,000 psi tensile strength makes these fasteners ideal for load-bearing applications where failure is not an option.

Specification Summary & Compliance

This 4" carriage bolt features precision UNC coarse threads with Class 2A fit tolerance for consistent performance. Manufactured to ASME B18.5 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial fasteners.