S-92620A143 5/8"-11 x 5 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
• Superior corrosion resistance through zinc yellow-chromate plating in harsh industrial environments
• Exceptional durability with Rockwell C33 hardness to withstand heavy vibration and stress
• Reliable coarse threading (UNC) for faster assembly and reduced cross-threading risks
• Precision external hex drive for secure tool engagement and high-torque installation
• Optimized partial threading providing superior clamping force in demanding applications
• Industry-standard compliance ensuring consistent performance across industrial systems

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction, machinery assembly, and structural frameworks. The zinc yellow-chromate finish provides superior corrosion protection against environmental elements and chemical exposure, while the UNC coarse thread design ensures rapid installation and reliable performance in high-vibration environments. With 150,000 psi tensile strength and Rockwell C33 hardness, these partially threaded screws maintain structural integrity under extreme loads, making them ideal for critical connections where failure is not an option. The external hex drive configuration allows for high-torque applications using standard industrial tools.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit and UNC coarse thread specifications (5/8"-11). These hex head screws comply with ASME B18.2.1 and SAE J429 Grade 8 requirements, ensuring dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, confirming environmental and safety standards adherence for industrial use worldwide.