S-93604A704 3/8"-16 x 12" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion protection with hot-dipped galvanized steel coating, ideal for outdoor and harsh industrial environments
• Exceptional tensile strength of 60,000 psi (Grade 2) ensures reliable performance under heavy loads
• Secure anti-rotation locking with square neck design that prevents spinning during installation
• Optimized load distribution from wide rounded head profile, reducing surface damage
• Easy installation and removal with coarse UNC threading and Class 2A thread fit
• Versatile partial threading allows for both clamping and adjustment in various assembly scenarios
• Consistent hardness at Rockwell B70 provides excellent wear resistance and durability

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt delivers critical corrosion resistance for structural applications exposed to weather, chemicals, or moisture. The square neck design eliminates the need for additional locking components by embedding securely into materials, preventing rotation during torque application. With Grade 2 strength and 3/8"-16 UNC coarse threading, it maintains clamping force in wood-to-metal connections, trailer assemblies, and construction frameworks where vibration resistance is essential. The partial threading configuration allows unthreaded shank sections to bear shear loads effectively, making it ideal for agricultural equipment, fencing systems, and industrial machinery requiring reliable heavy-duty fastening solutions.

Specification Summary & Compliance

Manufactured to ASTM A307 and ASME B18.5 standards with Class 2A thread fit tolerance. Features 3/8"-16 UNC coarse threads with minimum 6" thread length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.