S-92620A256 3/4"-16 x 3 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating that extends service life in harsh industrial environments
• Precise torque transmission enabled by external hex drive design and Rockwell C33 hardness for secure fastening without stripping
• Optimized thread engagement with UNF fine threading and Class 2A fit ensuring vibration resistance and consistent clamping force
• Reduced assembly weight through partial threading while maintaining full strength in critical engagement areas
• Guarded against material failure with Grade 8 certification meeting rigorous ASME B18.2.1 and SAE J429 standards
• Environmentally responsible manufacturing compliant with RoHS 3 and REACH regulations for global supply chain compatibility

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical performance where structural integrity is paramount. The zinc yellow-chromate plated steel construction provides superior corrosion protection in manufacturing equipment, construction machinery, and transportation systems. The 3/4"-16 UNF fine threading offers enhanced vibration resistance compared to coarse threads, while the partial threading design concentrates strength where needed most. With external hex drive compatibility standard across industrial tools, these fasteners enable efficient installation in confined spaces. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures reliable performance in high-stress applications including structural steel connections, heavy equipment assembly, and industrial machinery maintenance.

Specification Summary & Compliance

This 3/4"-16 UNF hex head screw features Class 2A thread fit tolerance for precise engagement and measures 3 3/4" in length with 1 3/4" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.