S-97000A517 5/16"-18 x 1 1/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 PSI tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding environments
• Secure anti-rotation design featuring a square neck that prevents spinning during installation and maintains positioning
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and consistent clamping force
• Enhanced durability through Rockwell C33 hardness, resisting deformation under heavy loads
• Versatile installation compatibility with fully threaded design allowing flexibility in material thickness
• Industry-standard compliance meeting ASME B18.5 and SAE J429 specifications for quality assurance

Professional Applications & Engineering Value

This Grade 8 carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plated finish provides superior protection against corrosion in outdoor equipment, agricultural machinery, and construction applications. The square neck design effectively prevents rotation during torque application, ensuring secure fastening in wood-to-metal connections and structural assemblies. With its 5/16"-18 UNC coarse thread and fully threaded configuration, this heavy-duty fastener offers excellent pull-out resistance and simplified installation across varying material thicknesses. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness makes it ideal for demanding applications in trailer manufacturing, heavy equipment, and industrial machinery where failure is not an option.

Specification Summary & Compliance

This carriage bolt features precision 5/16"-18 UNC coarse threads with Class 2A thread fit tolerance for consistent performance. Manufactured to meet ASME B18.5 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. The fastener complies with industry standards for Grade 8 high-strength requirements and features zinc yellow-chromate plating on steel substrate for enhanced corrosion protection. All materials and processes conform to relevant industrial regulations for heavy-duty applications.