S-93604A735 1/2"-13 x 8" ASTM A307, ASTM A153, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ensuring long-lasting performance in harsh environments
• Enhanced installation stability from the square neck design that prevents rotation during tightening, saving time and labor
• High tensile strength of 60,000 psi and Rockwell B70 hardness for reliable load-bearing in demanding applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit, facilitating quicker assembly and reducing cross-threading risks
• Partial threading allows for secure clamping while minimizing thread exposure in non-critical sections
• Compliance with ASTM A307 and ASME B18.5 standards, guaranteeing consistent quality and interchangeability
• Environmental and safety adherence through RoHS 3 and REACH compliance, supporting sustainable procurement

Professional Applications & Engineering Value

This hot-dipped galvanized steel carriage bolt is engineered to address common industrial challenges such as structural loosening and corrosion-induced failures. The square neck securely locks into materials, eliminating spin-out during installation in wood or metal frameworks, which is critical for assembly line efficiency. With a 1/2"-13 UNC coarse thread and partial threading, it ensures rapid fastening in heavy-duty settings like construction, agricultural equipment, and transportation infrastructure. The Grade 2 classification and 60,000 psi tensile strength provide dependable performance under dynamic loads, while the zinc coating from hot-dipping offers robust protection against moisture and chemicals, extending service life in outdoor or high-humidity environments.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent engagement and UNC coarse threading per industry standards. It conforms to ASTM A307 for material properties and ASME B18.5 for dimensional specifications, ensuring reliability in mechanical fastening. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its safety and environmental responsibility for global supply chains.