S-92620A745 1/2"-20 x 1 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: Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Protection: Zinc yellow-chromate plating offers enhanced resistance to rust and environmental degradation, extending service life in harsh industrial settings.
• Precise Thread Engagement: UNF fine threads with Class 2A fit provide excellent vibration resistance and secure fastening, minimizing loosening in dynamic equipment.
• High Durability & Wear Resistance: Rockwell C33 hardness and fully threaded design deliver consistent strength across the entire length, suitable for repetitive assembly and disassembly.
• Easy Installation & Removal: External hex drive and standard 3/4" head width allow for straightforward torque application with common tools, speeding up maintenance workflows.
• Regulatory Compliance Assurance: Meets ASME B18.2.1, SAE J429, RoHS 3, and REACH standards, ensuring safety and environmental responsibility for global supply chains.
• Optimized for Heavy-Duty Use: 1 1/4" length and fine thread spacing enable secure fastening in thick materials, ideal for construction, machinery, and automotive assemblies.

Professional Applications & Engineering Value

Engineered for demanding environments, this Grade 8 hex head screw combines high-strength steel construction with a zinc yellow-chromate plated finish to address common industrial challenges like corrosion and mechanical stress. The UNF fine thread pattern and Class 2A thread fit ensure tight, vibration-resistant connections in heavy machinery, automotive frames, and structural assemblies, reducing maintenance downtime. Its fully threaded design and external hex drive facilitate quick installation in high-volume production lines, while the 150,000 psi tensile strength supports critical load-bearing applications without deformation. Ideal for sectors requiring ASME B18.2.1 compliance, this screw delivers reliability in construction, manufacturing, and equipment repair, enhancing operational safety and longevity.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances and UNF thread standards for precise engagement, manufactured under ASME B18.2.1 and SAE J429 Grade 8 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.