S-92620A606 5/16"-24 x 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity - Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress applications, reducing failure risks.
• Superior Corrosion Protection - Zinc yellow-chromate plating provides enhanced resistance to rust and environmental degradation, extending service life in harsh conditions.
• Precise Thread Engagement - UNF fine threads with Class 2A fit offer vibration resistance and secure fastening, minimizing loosening in dynamic environments.
• High Durability & Wear Resistance - Rockwell C33 hardness maintains structural integrity under repeated loads and mechanical stress.
• Optimized Drive Efficiency - External hex head design allows for high-torque installation with standard tools, speeding up assembly processes.
• Full Thread Coverage - Fully threaded shank ensures consistent clamping force distribution along the entire length.
• Regulatory Compliance Assurance - Meets ASME B18.2.1 and SAE J429 standards, with RoHS 3 and REACH compliance for global industrial use.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical reliability in machinery, construction, and automotive assemblies where vibration and high tensile loads are common. The UNF fine thread configuration enhances fatigue resistance by distributing stress more evenly, while the zinc yellow-chromate finish combats corrosion in outdoor or humid environments. With a 150,000 psi tensile strength and Rockwell C33 hardness, they prevent stripping and deformation under extreme conditions, making them ideal for structural frames, engine components, and equipment requiring long-term fastening integrity. The external hex drive facilitates quick installation with common wrenches, reducing downtime in production lines.

Specification Summary & Compliance

This 5/16"-24 UNF screw features a Class 2A thread fit for precise tolerance, ensuring consistent engagement. Manufactured to ASME B18.2.1 and SAE J429 specifications, it guarantees dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, adhering to environmental and safety standards for industrial use worldwide.