S-93548A887 3/4"-10 x 4" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior Anti-Rotation Performance - Square neck design securely locks into materials, preventing bolt spin during installation and under vibration
• Enhanced Corrosion Resistance - Zinc-plated steel construction provides reliable protection against rust and environmental degradation
• Heavy-Duty Load Capacity - Grade 2 strength rating with 60,000 PSI tensile strength ensures reliable performance in demanding applications
• Optimized Thread Engagement - UNC coarse threading with Class 2A fit allows for faster installation and better performance in softer materials
• Wide Application Compatibility - Fully threaded design accommodates various material thicknesses and provides maximum fastening flexibility
• Consistent Mechanical Properties - Rockwell B70 hardness maintains dimensional stability and prevents deformation under stress
• Rounded Head Safety - Carriage bolt head profile minimizes snagging hazards while providing a finished appearance

Professional Applications & Engineering Value

This heavy-duty carriage bolt delivers exceptional engineering value in construction, industrial machinery, and structural applications where vibration resistance and long-term reliability are critical. The zinc-plated steel construction combined with the square neck design solves common installation challenges by preventing rotation during tightening, eliminating the need for secondary locking mechanisms. The UNC coarse thread pattern ensures rapid assembly in wood, metal, and composite materials, while the fully threaded configuration accommodates varying material thicknesses without compromising clamping force. With Grade 2 strength classification and 60,000 PSI tensile capacity, this fastener maintains structural integrity in high-stress environments, making it ideal for timber framing, trailer construction, and heavy equipment assembly where anti-rotation performance and corrosion protection are paramount.

Specification Summary & Compliance

This carriage bolt features precision Class 2A thread fit with 3/4"-10 UNC coarse threading and right-hand thread direction. Manufacturing and quality standards compliance includes ASTM A307 for chemical and mechanical properties, SAE J429 for Grade 2 strength requirements, and ASME B18.5 for dimensional specifications. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring responsible material sourcing and manufacturing practices for global industrial applications.