S-92865A121 5/16"-24 x 3" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Precision fine thread engagement with UNF 5/16"-24 pattern and Class 2A fit for secure fastening in critical assemblies
- High-strength Grade 5 certification ensuring consistent mechanical properties and Rockwell C25 hardness
- Optimal torque transmission via external hex drive and 1/2" head width for efficient installation
- Full 3-inch threading providing maximum grip length and uniform stress distribution
- Comprehensive regulatory compliance meeting ASME, SAE, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 5 steel hex head screw addresses critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The UNF fine thread pattern (5/16"-24) delivers enhanced vibration resistance and superior clamping force compared to coarse threads, while the Class 2A thread fit ensures consistent engagement without binding. The zinc-plated finish provides essential corrosion protection in environments exposed to moisture and chemicals. With fully threaded 3-inch length and external hex drive, installers benefit from maximum thread contact and efficient torque application using standard tools. These high-strength fasteners are particularly valuable in automotive, construction, and manufacturing sectors where precision and reliability are paramount.
Specification Summary & Compliance
This hex head screw maintains Class 2A thread fit tolerance per UNF standards with precise 5/16"-24 fine threading. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical consistency. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming compliance with international substance restrictions for industrial components.
