S-93604A677 3/8"-16 x 2 1/4" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating for long-lasting performance in harsh environments
• Secure anti-rotation locking thanks to the integrated square neck design that prevents spinning during installation
• High tensile strength of 60,000 psi and Grade 2 classification for reliable load-bearing capacity in structural applications
• Excellent hardness rating of Rockwell B70 ensures durability and resistance to deformation under stress
• Easy installation with coarse UNC threading and right-hand direction for quick assembly in wood and metal applications
• Wide rounded head profile provides larger bearing surface for secure fastening and reduced surface damage
• Full regulatory compliance with industry standards including ASTM A307, ASME B18.5, RoHS 3, and REACH

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt delivers exceptional engineering value for industrial applications where corrosion resistance and structural integrity are paramount. The Grade 2 strength classification combined with 60,000 psi tensile strength makes it ideal for heavy-duty construction, agricultural equipment, and outdoor structural assemblies. The square neck design provides critical anti-rotation performance, eliminating the need for additional locking mechanisms and reducing installation time. The coarse UNC threading ensures reliable engagement in wood, metal, and composite materials, while the hot-dipped galvanized coating offers superior protection against rust and environmental degradation. These carriage bolts are engineered to withstand vibration, load stress, and harsh weather conditions, making them perfect for bridge construction, trailer manufacturing, and industrial machinery applications where long-term reliability is essential.

Specification Summary & Compliance

This 3/8"-16 carriage bolt features precise Class 2A thread fit with coarse UNC threading and right-hand direction. Manufactured to exacting standards including ASTM A307 for material composition and ASME B18.5 for dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications. The hot-dipped galvanized steel construction meets ASTM A153 specifications for corrosion protection, while the mechanical properties conform to Grade 2 strength requirements with verified 60,000 psi tensile strength and Rockwell B70 hardness.