S-91268A712 1/2"-13 x 8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 150,000 psi tensile strength, ideal for high-stress structural connections
- Superior wear resistance due to Rockwell C33 hardness, extending service life in demanding environments
- Optimized thread engagement through partial threading design, providing enhanced grip while reducing installation weight
- Precise mechanical compatibility with Class 2A thread fit ensuring smooth assembly with standard nuts
- Reliable torque transmission via external hex drive and 3/4" head width, preventing tool slippage during installation
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance, safe for regulated industrial applications
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in structural assembly and machinery manufacturing. The 1/2"-13 UNC coarse thread configuration combined with partial threading delivers superior clamping force distribution while minimizing material stress concentration. The steel construction with external hex drive enables high-torque installation in confined spaces, making it ideal for construction equipment, industrial machinery, and transportation infrastructure where vibration resistance and long-term reliability are paramount. The 8-inch length provides sufficient engagement for thick material stacks while maintaining structural integrity under dynamic loads.
Specification Summary & Compliance
This hex head screw maintains precision Class 2A thread fit per ASME B18.2.1 specifications with 1/2"-13 UNC coarse thread profile. Manufacturing complies with SAE J429 Grade 8 requirements for mechanical properties including 150,000 psi tensile strength and Rockwell C33 hardness. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring suitability for global industrial applications.
