S-91268A684 1/2"-13 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 with 150,000 psi tensile strength for critical structural applications
• Exceptional durability achieved through Rockwell C33 hardness and Grade 8 steel construction
• Secure fastening performance with Class 2A thread fit ensuring precise engagement and vibration resistance
• Optimized installation efficiency through external hex drive design and coarse UNC threading
• Versatile partial threading allowing for both clamping force and unthreaded shank strength benefits
• Heavy-duty industrial compatibility with 3/4" hex head providing superior torque transmission
• Regulatory compliance assurance meeting ASME B18.2.1 standards and environmental regulations

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 hex head screws deliver exceptional performance in heavy machinery, structural steel connections, and high-vibration applications. The 1/2"-13 UNC coarse threading provides superior resistance to loosening under dynamic loads, while the partial threading design offers optimal balance between thread engagement and unthreaded shank strength. The external hex drive configuration ensures reliable torque application during installation, making these steel fasteners ideal for construction equipment, automotive assemblies, and industrial manufacturing where 150,000 psi tensile strength is critical for safety and longevity.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with 1/2"-13 UNC coarse thread spacing in right-hand orientation. These 6-inch length screws with 1-1/4" minimum thread length comply with ASME B18.2.1 specifications and SAE J429 Grade 8 requirements. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial applications.