S-93604A681 3/8"-16 x 3" 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
• Enhanced anti-rotation security through square neck design that locks into materials during tightening
• Reliable 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 installation and vibration resistance
• Wide bearing surface from rounded carriage head design that distributes clamping force effectively
• Full-threaded versatility allowing installation at any point along the bolt's 3" length
• Industry-standard compliance meeting ASTM A307, ASME B18.5 and environmental regulations for quality assurance

Professional Applications & Engineering Value

These hot-dipped galvanized steel carriage bolts deliver exceptional value in demanding industrial settings where corrosion resistance and structural integrity are paramount. The square neck design fundamentally addresses rotation prevention during assembly, eliminating the need for additional locking mechanisms in wood-to-metal and structural timber connections. The UNC coarse threading provides superior performance in softer materials and faster installation times, while the fully threaded configuration offers installation flexibility across various material thicknesses. With 60,000 PSI tensile strength and Rockwell B70 hardness, these Grade 2 bolts maintain clamping force under substantial loads, making them ideal for construction frameworks, trailer assemblies, agricultural equipment, and outdoor structures where environmental exposure demands durable galvanized protection.

Specification Summary & Compliance

This 3/8"-16 UNC carriage bolt maintains precise Class 2A thread fit tolerances with coarse thread spacing for reliable engagement. Manufacturing complies with ASTM A307 specifications for low carbon steel structural bolts and ASME B18.5 dimensional standards. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations governing chemical substances, ensuring environmental responsibility in industrial supply chains.