S-93548A583 5/16"-18 x 1" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Reliable anti-rotation performance through integrated square neck design that prevents bolt spinning during installation
• Heavy-duty load capacity with 60,000 PSI tensile strength suitable for structural and construction applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
• Enhanced material durability with Rockwell B70 hardness providing excellent resistance to deformation under stress
• Wide compatibility with rounded carriage head profile accommodating various industrial and construction requirements
• Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety

Professional Applications & Engineering Value

These Grade 2 carriage bolts deliver exceptional engineering value in heavy-duty fastening scenarios where vibration resistance and structural integrity are paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, agricultural machinery, and construction frameworks exposed to environmental elements. The square neck design fundamentally addresses rotational instability during torque application, ensuring secure placement in wood-to-metal and structural steel connections. With UNC coarse threading and Class 2A thread fit, these fasteners enable rapid installation in timber, structural steel, and industrial equipment while maintaining consistent clamping force. The combination of 60,000 PSI tensile strength and Rockwell B70 hardness creates an optimal balance between durability and machinability for demanding applications across construction, transportation, and heavy equipment industries.

Specification Summary & Compliance

This 5/16"-18 carriage bolt features precise Class 2A thread fit tolerances with UNC coarse thread specifications. Manufacturing complies with ASTM A307 for low carbon steel structural bolts, SAE J429 for mechanical properties, and ASME B18.5 for dimensional standards. The product is fully RoHS 3 (2015/863/EU) Compliant for environmental safety, with material certification covering chemical composition and mechanical properties as specified in the governing standards.