S-93604A669 3/8"-16 x 1 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 extended service life in harsh environments
• Secure anti-rotation performance through integrated square neck design that prevents spinning during installation
• Excellent load-bearing capacity with Grade 2 classification and 60,000 psi tensile strength for structural applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and reliable connections
• Enhanced durability with Rockwell B70 hardness rating that maintains integrity under repeated stress
• Broad compatibility with rounded carriage head profile that sits flush while providing wide bearing surface
• Full-threaded convenience allowing installation at any point along the bolt's 1-1/4" length

Professional Applications & Engineering Value

These hot-dipped galvanized steel carriage bolts deliver exceptional value in construction, agricultural equipment, and structural framing applications where corrosion resistance and vibration resistance are critical. The square neck design eliminates the need for secondary locking mechanisms by positively engaging with mounted materials, preventing rotation during torque application and throughout service life. The Grade 2 strength classification combined with 60,000 psi tensile strength ensures reliable performance in load-bearing connections, while the UNC coarse threading provides superior pull-out resistance in wood and soft materials. The rounded head profile offers a finished appearance while the wide bearing surface distributes clamping force effectively, making these carriage bolts ideal for timber structures, trailer assemblies, and industrial equipment where both performance and safety are paramount.

Specification Summary & Compliance

This 3/8"-16 carriage bolt features precise Class 2A thread fit with UNC coarse thread spacing and right-hand threading direction. Manufacturing complies with ASTM A307 for carbon steel bolts, ASTM A153 for zinc coating (hot-dip galvanizing), and ASME B18.5 dimensional standards. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for industrial components.