S-92620A117 5/16"-32 x 1 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress environments
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh conditions
• Precise thread engagement with UNEF extra fine threads ensuring secure fastening in thin materials and fine adjustments
• Maximum thread coverage through full threading along the entire 1 1/4" length for enhanced grip and distribution of stress
• Optimized drive efficiency with external hex head design allowing high torque application and easy installation
• Consistent quality assurance meeting ASME B18.2.1 and SAE J429 specifications for industrial-grade reliability
• Enhanced durability with Rockwell C33 hardness providing excellent resistance to wear and deformation

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical engineering solutions where high tensile strength and precision threading are paramount. The UNEF extra fine thread configuration provides superior holding power in thin-section materials and applications requiring fine adjustment capabilities, while the fully threaded design ensures maximum engagement across the entire fastener length. The zinc yellow-chromate plating offers enhanced corrosion resistance for demanding industrial environments including machinery, automotive assemblies, and structural applications. Manufactured from high-strength steel with external hex drive, these fasteners withstand extreme vibration and loading conditions while maintaining Class 2A thread fit precision for consistent performance in critical assemblies.

Specification Summary & Compliance

This 5/16"-32 hex head screw features Class 2A thread fit tolerances with right-hand thread direction and fully threaded construction. The fastener complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties meet industrial standards. With Rockwell C33 hardness and 150,000 psi tensile strength, this Grade 8 screw delivers reliable performance for heavy-duty applications requiring precise engineering tolerances and certified quality assurance.