S-92865A103 5/16"-24 x 5/8" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity – Grade 5 classification and 120,000 PSI tensile strength ensure reliable performance in high-stress applications.
• Superior Corrosion Resistance – Zinc plating provides a durable protective layer, extending service life in demanding environments.
• Precise Thread Engagement – Class 2A thread fit and UNF fine threads offer secure, vibration-resistant fastening with reduced risk of cross-threading.
• Optimized Torque Application – External hex drive and standard 1/2" head width allow for easy installation with common tools and consistent clamping force.
• Full Thread Coverage – Fully threaded 5/8" length ensures maximum grip and adjustability across the entire shank.
• Industry Compliance Assurance – Meets ASME B18.2.1 and SAE J429 standards, guaranteeing dimensional accuracy and mechanical properties.
• Environmental Responsibility – RoHS 3 and REACH compliance confirms safe use in regulated industrial and international markets.

Professional Applications & Engineering Value

This 5/16"-24 UNF Grade 5 steel hex head screw is engineered to address critical challenges in machinery assembly, automotive systems, and structural frameworks where vibration resistance and long-term reliability are paramount. The fine thread design enhances clamping force distribution, minimizing loosening under dynamic loads, while the zinc plating defends against oxidation in humid or outdoor settings. Its fully threaded configuration ensures uniform stress distribution along the entire 5/8" length, making it ideal for components requiring precise alignment and robust fastening. By integrating high tensile strength with standardized external hex drive compatibility, this fastener streamlines maintenance and reduces assembly time in industrial applications.

Specification Summary & Compliance

Manufactured to Class 2A thread fit tolerances per UNF (Unified National Fine) standards, this screw guarantees precise thread engagement and interchangeability. It conforms to ASME B18.2.1 and SAE J429 specifications for dimensional and mechanical integrity, with a verified Rockwell C25 hardness and 120,000 PSI tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements for global industrial use.