S-91268A258 3/8"-16 x 1/2" 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 for reliable performance in high-stress applications
- Superior wear resistance due to Rockwell C33 hardness, extending service life in demanding environments
- Optimized torque transmission through external hex drive design for secure installation and removal
- Enhanced engagement efficiency with UNC coarse thread spacing and Class 2A fit for faster assembly
- Full-threaded construction ensures maximum grip length and uniform stress distribution
- Rigorous quality assurance through compliance with ASME B18.2.1 and SAE J429 standards
- Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for sustainable procurement
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional reliability in construction equipment, machinery assembly, and structural frameworks. The steel construction combined with 150,000 PSI tensile strength provides critical resistance against vibrational loosening and dynamic loads. The 3/8"-16 UNC coarse thread configuration ensures rapid installation in thick materials and castings, while the external hex drive accommodates standard tools for maintenance efficiency. These fully threaded fasteners maintain consistent clamping force across the entire engagement length, preventing joint failure in high-vibration environments common in manufacturing and heavy equipment sectors.
Specification Summary & Compliance
This Grade 8 hex head screw features precise Class 2A thread fit tolerance for consistent engagement and meets UNC coarse thread standards with 3/8"-16 threading. Manufacturing specifications comply with ASME B18.2.1 and SAE J429 Grade 8 requirements for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for global industrial applications.
