S-93548A581 5/16"-18 x 3/4" 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
• Prevents rotation during installation thanks to the integrated square neck design that locks securely into materials
• Excellent tensile strength rated at 60,000 PSI (Grade 2) for reliable performance in heavy-duty applications
• Optimized thread engagement with UNC coarse threading providing faster assembly and reduced cross-threading risk
• Enhanced durability with Rockwell B70 hardness maintaining structural integrity under repeated stress
• Wide compatibility with Class 2A thread fit ensuring consistent performance across standard industrial components
• Secure fastening solution featuring fully threaded design for maximum grip length and load distribution

Professional Applications & Engineering Value

This Grade 2 zinc-plated steel carriage bolt delivers exceptional engineering value through its square neck design that eliminates spinning during torque application, solving common installation challenges in wood-to-metal and structural connections. The UNC coarse thread configuration ensures rapid assembly in timber, construction frameworks, and agricultural equipment while maintaining 60,000 PSI tensile strength for critical load-bearing applications. The zinc-plated finish provides reliable corrosion protection in outdoor and industrial environments, making these carriage bolts ideal for machinery assembly, trailer manufacturing, and structural steel connections where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC 5/16"-18 coarse threading. Compliant with ASTM A307, SAE J429, and ASME B18.5 specifications for quality assurance. Meets RoHS 3 (2015/863/EU) environmental compliance requirements for industrial use.