S-92620A569 1/4"-28 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 applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in demanding environments
• Precise thread engagement with UNF fine threading and Class 2A fit for secure fastening and vibration resistance
• Maximum torque transmission via external hex drive design for easy installation and removal with standard tools
• Enhanced durability with Rockwell C33 hardness maintaining structural integrity under repeated stress
• Full-length threading providing consistent grip along the entire 3" shaft for uniform load distribution
• 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 advantages for industrial applications where failure is not an option. The combination of high-strength steel construction and UNF fine threading provides superior resistance to vibrational loosening in machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating creates a protective barrier against corrosion in harsh environments, while the external hex drive enables high-torque installation without stripping. Engineered with Class 2A thread fit, these fasteners ensure precise mating with corresponding components, reducing assembly time and preventing cross-threading issues in production environments. The fully threaded design along the 3" length offers maximum engagement surface for critical connections in heavy equipment and construction applications.

Specification Summary & Compliance

Manufactured to exacting inch system dimensions with Class 2A thread fit tolerance for precision assembly. Complies with ASME B18.2.1 and SAE J429 specifications governing dimensional requirements and mechanical properties. Features UNF fine threading (1/4"-28) with right-hand thread direction and meets industry standards for material composition and performance testing. The zinc yellow-chromate finish provides environmental protection while maintaining electrical conductivity where required.