S-93548A881 3/4"-10 x 3" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Secure Anti-Rotation Design: Integrated square neck prevents bolt spinning during installation, ensuring reliable, vibration-resistant fastening in demanding applications.
• Heavy-Duty Strength & Durability: Grade 2 classification with 60,000 psi tensile strength and Rockwell B70 hardness provides robust performance for structural and construction uses.
• Superior Corrosion Resistance: Zinc-plated steel finish offers enhanced protection against rust and environmental wear, extending service life in outdoor or humid conditions.
• Optimized Thread Engagement: Fully threaded UNC coarse spacing and Class 2A fit enable quick assembly and strong holding power in wood, metal, and composite materials.
• Broad Industry Compliance: Meets ASTM A307, SAE J429, and ASME B18.5 standards, ensuring consistent quality and interchangeability for professional projects.
• Enhanced Load Distribution: Wide, rounded carriage head design minimizes surface pressure and reduces the risk of material damage under high stress.
• Environmental & Regulatory Safety: RoHS 3 and REACH compliance guarantees the bolt is free from hazardous substances, supporting safe and sustainable operations.

Professional Applications & Engineering Value

This 3/4"-10 UNC carriage bolt is engineered to address critical fastening challenges in construction, heavy machinery, and structural assemblies. The zinc-plated steel construction combats corrosion in exposed environments, while the square neck design eliminates rotation during torque application, preventing loosening under dynamic loads. Its fully threaded coarse spacing ensures rapid installation and superior grip in soft or thick materials, reducing assembly time. With a Grade 2 strength rating and 60,000 psi tensile strength, it reliably handles high-stress applications like timber framing, trailer builds, and industrial equipment, where vibration resistance and long-term integrity are paramount. The combination of ASTM A307, SAE J429, and ASME B18.5 compliance assures precise dimensional accuracy and performance consistency for engineering and procurement teams.

Specification Summary & Compliance

This carriage bolt features Class 2A thread fit and UNC coarse threading for standard tolerance and easy engagement. It adheres to manufacturing specifications including ASTM A307, SAE J429, and ASME B18.5, ensuring dimensional precision and mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries and environmentally conscious projects.