S-93604A723 1/2"-13 x 4 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 for extended service life in harsh environments
• Enhanced anti-rotation performance through integrated square neck design that prevents spinning during installation
• High tensile strength of 60,000 PSI (Grade 2) ensures reliable load-bearing capacity for structural applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
• Wide rounded head design provides excellent bearing surface and prevents pull-through in wood and metal applications
• Consistent hardness (Rockwell B70) maintains structural integrity under repeated stress and vibration
• Full threading availability allows for maximum adjustability and versatile installation options

Professional Applications & Engineering Value

These hot-dipped galvanized steel carriage bolts deliver exceptional engineering value in demanding industrial environments where corrosion resistance and vibration resistance are critical. The square neck design fundamentally solves the common problem of bolt rotation during nut tightening, making them ideal for wood-to-metal connections in structural frameworks, trailer assemblies, and heavy equipment. The UNC coarse threading ensures rapid installation in field conditions while maintaining Grade 2 strength classification for reliable performance in construction, agricultural machinery, and outdoor infrastructure projects. The combination of zinc coating thickness from the hot-dip process and 60,000 PSI tensile strength creates a durable fastening solution that withstands environmental exposure without compromising mechanical integrity.

Specification Summary & Compliance

This 1/2"-13 x 4-1/2" carriage bolt features precise Class 2A thread fit with UNC coarse thread pattern and right-hand threading. Manufactured to meet ASTM A307 specifications for carbon steel bolts, ASTM A153 for zinc coating (hot-dip), and ASME B18.5 dimensional standards. Fully compliant with RoHS 3 (2015/863/EU) environmental regulations, ensuring restriction of hazardous substances in industrial applications.