S-92620A613 5/16"-24 x 2 1/2" 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 applications
• Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
• Precise thread engagement with Class 2A UNF fine threads ensuring secure fastening and vibration resistance
• Maximum hardness durability with Rockwell C33 rating maintaining structural integrity under repeated use
• Full-threaded design providing consistent clamping force along the entire 2½" length
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability
• Optimized drive efficiency with external hex head design allowing high torque application and easy installation

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plating creates a protective barrier that withstands exposure to moisture, chemicals, and outdoor elements, significantly extending service life in industrial equipment, construction machinery, and automotive assemblies. The UNF fine thread configuration provides superior resistance to loosening under vibration compared to coarse threads, making these fully threaded screws ideal for precision applications requiring uniform stress distribution. Engineered to ASME B18.2.1 and SAE J429 standards, these fasteners ensure reliable performance in critical connections where failure is not an option.

Specification Summary & Compliance

This 5/16"-24 hex head screw features precise Class 2A thread fit tolerances with UNF fine threading (24 threads per inch) for optimal engagement. Manufactured from high-strength steel with Rockwell C33 hardness and 150,000 PSI tensile strength, the fastener complies with ASME B18.2.1 dimensional specifications and SAE J429 material standards. The zinc yellow-chromate plating provides RoHS-compliant corrosion protection while maintaining the fastener's mechanical properties. With 2½" length and external hex drive configuration, this heavy-duty fastener meets rigorous industrial requirements for reliability and performance.