S-92620A660 3/8"-24 x 3" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress environments
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding conditions
• Precise thread engagement with Class 2A UNF fine threads ensuring secure fastening and vibration resistance
• Maximum thread coverage through full threading along the 3" length for enhanced grip and distribution of clamping forces
• Optimized torque transmission via the external hex drive and 9/16" head width for efficient installation
• Consistent mechanical properties with Rockwell C33 hardness maintaining dimensional stability under heavy loads
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interoperability

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance in heavy machinery, construction equipment, and automotive assemblies where high-strength fastening is paramount. The 3/8"-24 UNF fine thread configuration provides superior resistance to vibrational loosening while maintaining precise alignment in steel-to-steel connections. The zinc yellow-chromate plating creates a protective barrier against oxidation and chemical exposure, significantly extending maintenance intervals in industrial environments. Engineered with fully threaded design and external hex drive, these fasteners ensure maximum thread engagement and straightforward installation using standard tools, reducing assembly time while providing reliable 150,000 psi tensile strength for critical structural applications.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerance for consistent engagement and UNF fine thread specification (3/8"-24). Complies with ASME B18.2.1 and SAE J429 specifications governing dimensional requirements and mechanical properties for Grade 8 fasteners. Features include right-hand thread direction, 1/4" head height, and 9/16" head width for standardized installation. The zinc yellow-chromate plating provides RoHS-compliant corrosion protection while maintaining the Rockwell C33 hardness and 150,000 psi tensile strength required for heavy-duty industrial applications.