S-91268A694 1/2"-13 x 6 1/2" 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 wear resistance due to Rockwell C33 hardness, ensuring extended service life and reduced replacement frequency
• Optimized thread engagement through partial threading design that provides enhanced grip while minimizing material usage
• Precise installation control with external hex drive and 3/4" head width for secure tool engagement and consistent torque application
• Reliable fastening performance with Class 2A thread fit ensuring smooth assembly and consistent clamping force
• Broad compatibility with 1/2"-13 UNC coarse threads that resist loosening in vibrating environments and allow for quick installation
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe use across global markets

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this Grade 8 hex head screw delivers exceptional mechanical properties where failure is not an option. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness provides critical resistance against shear forces and material deformation in heavy machinery, structural steel connections, and equipment manufacturing. The 1/2"-13 UNC coarse thread configuration ensures rapid installation while maintaining vibration resistance, significantly reducing assembly time in production lines. Partial threading concentrates the fastener's strength where needed most, preventing thread stripping in soft materials while providing maximum clamping force. These steel fasteners are particularly valuable in construction, automotive, and industrial equipment applications where external hex drive accessibility and high-strength requirements are paramount for maintenance efficiency and operational safety.

Specification Summary & Compliance

This 6 1/2" length hex head screw features precise Class 2A thread fit per UNC standards with minimum thread length of 1 1/4". Manufactured in compliance with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring unrestricted use in international markets. All measurements conform to inch system requirements with head dimensions of 5/16" height and 3/4" width for standardized tool compatibility.