S-91268A110 3/8"-16 x 1 1/8" 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 industrial applications
• Superior corrosion resistance and durability through Grade 8 steel construction with Rockwell C33 hardness
• Easy installation and removal with external hex drive design and 9/16" head width for secure tool engagement
• Optimized thread engagement with 3/8"-16 UNC coarse threading and Class 2A fit for faster assembly in various materials
• Reduced material costs through partial threading that provides unthreaded shank strength where full threads aren't required
• Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial use
• Versatile 1 1/8" length accommodating various material thicknesses while maintaining structural integrity

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy-duty applications where failure is not an option. The 3/8"-16 UNC coarse threading provides superior grip in softer materials and faster installation times, while the partial threading design maintains maximum shank strength in shear applications. Manufactured from high-strength steel with Rockwell C33 hardness, this fastener withstands extreme vibration, dynamic loads, and harsh environmental conditions common in construction equipment, automotive assemblies, and industrial machinery. The external hex drive configuration ensures positive torque transmission, reducing stripping risks during high-torque applications. These industrial-grade screws are engineered to prevent joint failure in critical connections, minimizing downtime and maintenance costs across manufacturing, infrastructure, and heavy equipment sectors.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per ASME B18.2.1 specifications, ensuring consistent performance and interchangeability. The 3/8"-16 UNC coarse thread configuration follows standardized dimensions for reliable engagement. Manufacturing compliance includes ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. Environmental regulatory compliance is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring restricted substance adherence for global industrial applications.