S-91268A800 9/16"-12 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity - Grade 8 classification and 150,000 PSI tensile strength ensure reliable performance in high-stress industrial applications
• Superior Wear Resistance - Rockwell C33 hardness provides exceptional durability against mechanical wear and repeated use
• Optimized Thread Engagement - 9/16"-12 UNC coarse threading with Class 2A fit offers secure fastening and reduced cross-threading risk
• Enhanced Installation Efficiency - External hex drive with 13/16" head width allows for standard wrench access and high torque application
• Strategic Thread Distribution - Partial threading on the 6" length provides unthreaded shank strength where needed while maintaining full thread engagement
• Regulatory Compliance Assurance - Meets ASME B18.2.1 and SAE J429 standards with RoHS 3 and REACH environmental compliance
• Corrosion-Resistant Steel Construction - High-grade steel material ensures long-term reliability in demanding industrial environments

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value through its high-strength steel construction and precision UNC coarse threading. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness makes it ideal for heavy machinery, structural steel connections, and industrial equipment where vibration resistance and load capacity are critical. The partially threaded design provides maximum strength in the shank section while ensuring proper thread engagement, solving common issues of thread stripping under extreme loads. The external hex drive with substantial head dimensions accommodates standard industrial tools, enabling efficient installation in confined spaces common in manufacturing and construction applications.

Specification Summary & Compliance

This 9/16"-12 UNC hex head screw features precise Class 2A thread fit with coarse thread spacing for optimal performance. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for sustainable manufacturing practices.