S-92620A812 5/8"-11 x 5 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity - Grade 8 classification with 150,000 psi tensile strength ensures reliable performance in high-stress applications
• Superior Corrosion Protection - Zinc yellow-chromate plating provides enhanced resistance to rust and environmental degradation
• Optimized Thread Engagement - UNC coarse threading with Class 2A fit guarantees secure fastening and vibration resistance
• Exceptional Durability - Rockwell C33 hardness maintains structural integrity under repeated stress and heavy loads
• Industry-Standard Compliance - Meets ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability
• Full Thread Coverage - Complete threading along the 5½" length enables maximum grip strength and adjustment flexibility
• Easy Installation & Removal - External hex drive design allows for straightforward application with standard tools

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc yellow-chromate plated steel construction addresses common corrosion challenges in manufacturing, construction, and heavy equipment applications. The 5/8"-11 UNC coarse threading provides superior resistance to vibration loosening while maintaining easy installation in various materials. With 150,000 psi tensile strength and Rockwell C33 hardness, these fasteners withstand extreme mechanical stresses in structural assemblies, machinery frames, and load-bearing connections. The external hex drive design ensures reliable torque transmission without stripping, making them ideal for maintenance-critical applications requiring repeated service access.

Specification Summary & Compliance

This 5/8"-11 hex head screw features precision Class 2A thread fit tolerances with UNC coarse threading and right-hand thread direction. Manufactured to exact ASME B18.2.1 and SAE J429 specifications, ensuring dimensional consistency and mechanical performance. The fastener maintains full compliance with industry standards for Grade 8 strength classification, including the specified tensile strength and hardness requirements. The zinc yellow-chromate plating provides RoHS-compliant corrosion protection while maintaining the structural integrity required for critical industrial applications.