S-93604A657 5/16"-18 x 4" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts
Carriage Bolts
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Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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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 installation thanks to the square neck design that prevents spinning during tightening
- Excellent load-bearing capacity with 60,000 PSI tensile strength suitable for structural applications
- Optimized thread engagement through fully threaded 5/16"-18 UNC coarse pattern for faster assembly
- Consistent mechanical properties with Rockwell B70 hardness ensuring reliable performance under stress
- Wide compatibility with Class 2A thread fit for smooth installation in various industrial applications
- Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety
Professional Applications & Engineering Value
These hot-dipped galvanized steel carriage bolts deliver exceptional engineering value for industrial fastening applications where corrosion resistance and structural integrity are paramount. The fully threaded 5/16"-18 UNC coarse thread configuration ensures maximum grip strength in wood-to-metal and structural steel connections, while the square neck design eliminates rotation during installation, significantly reducing assembly time in construction, agricultural equipment, and outdoor infrastructure projects. The Grade 2 classification combined with 60,000 PSI tensile strength provides reliable performance in load-bearing applications, making these carriage bolts ideal for bridge components, trailer assemblies, and framing systems exposed to environmental elements.
Specification Summary & Compliance
This 4" carriage bolt features precise Class 2A thread fit with 5/16"-18 UNC coarse threading and right-hand thread direction. Manufactured to ASTM A307 specifications for Grade 2 bolts with additional compliance to ASTM A153 for hot-dip galvanizing and ASME B18.5 for dimensional standards. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence for global industrial applications.
