S-92620A621 3/8"-16 x 5/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capability - Grade 8 classification and 150,000 PSI tensile strength ensure reliable performance in high-stress industrial applications
• Superior Corrosion Protection - Zinc yellow-chromate plating provides enhanced resistance to rust and environmental degradation
• Optimized Thread Engagement - Fully threaded UNC coarse pattern with Class 2A fit guarantees secure fastening and vibration resistance
• High Durability Construction - Rockwell C33 hardness rating maintains structural integrity under repeated stress and heavy loads
• Industry-Standard Compatibility - External hex drive and standard 3/8"-16 thread size ensure easy installation with common tools
• Regulatory Compliance Assurance - Meets ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality and environmental safety
• Versatile Application Range - Right-hand threading and 5/8" length provide flexibility across various assembly requirements

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The steel construction with Rockwell C33 hardness provides the necessary toughness for heavy machinery, structural frameworks, and equipment assemblies subject to constant vibration and dynamic loads. The zinc yellow-chromate plating addresses corrosion concerns in harsh operating conditions, extending service life while maintaining dimensional stability. The 3/8"-16 UNC coarse threading with Class 2A fit ensures rapid installation and reliable clamping force distribution, making these fully threaded fasteners ideal for construction, manufacturing, and automotive applications where time efficiency and joint integrity are critical.

Specification Summary & Compliance

These hex head screws maintain precise Class 2A thread fit tolerances per UNC standards, ensuring consistent performance across applications. Manufacturing adheres to ASME B18.2.1 and SAE J429 Grade 8 specifications, guaranteeing dimensional accuracy and mechanical properties. The fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing assurance for international projects and sustainable manufacturing practices.