S-93548A679 7/16"-14 x 2 1/2" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments.
• Exceptional tensile strength of 60,000 psi (Grade 2) for reliable performance in heavy-duty structural and machinery applications.
• Secure anti-rotation locking provided by the integrated square neck, preventing bolt spinning during installation and ensuring stable connections.
• Easy installation and removal with UNC coarse threading and Class 2A thread fit, offering smooth engagement and reduced cross-threading risks.
• Wide-rounded head design distributes clamping force evenly, minimizing surface damage and improving load-bearing capacity.
• Full threading versatility allows for adjustable nut placement along the entire bolt length, accommodating various material thicknesses.
• Compliance with major industry standards including ASTM A307, SAE J429, and ASME B18.5, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 2 zinc-plated steel carriage bolt is engineered to address common challenges in industrial assembly, such as vibration-induced loosening and corrosion degradation. The square neck design securely locks into wood or metal, eliminating rotation during torque application—a critical feature for structural frameworks, trailer beds, and agricultural equipment. With UNC coarse threading and Class 2A thread fit, it ensures rapid installation in coarse-grained materials while maintaining alignment. The zinc plating provides a sacrificial layer against rust, making it ideal for outdoor or high-moisture environments. Combined with 60,000 psi tensile strength and Rockwell B70 hardness, this fastener delivers durable, long-term performance in demanding applications like construction, transportation, and machinery manufacturing.

Specification Summary & Compliance

This carriage bolt features a 7/16"-14 UNC coarse thread with Class 2A tolerance for consistent fit. It meets ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, adhering to environmental and safety regulations for industrial use.