S-91247A928 1"-8 x 6" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength, ideal for heavy-duty structural and machinery applications
• Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Reliable fastening performance with Grade 5 classification and Rockwell C25 hardness, ensuring consistent clamping force
• Optimized installation efficiency featuring coarse UNC threading and external hex drive for rapid assembly with standard tools
• Precision thread engagement with Class 2A fit, reducing cross-threading risks and maintaining joint integrity
• Versatile partial threading design allowing both secure clamping and alignment flexibility in multi-material assemblies
• Full regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global project specifications

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this Grade 5 hex head screw delivers critical solutions where vibration resistance and structural integrity are paramount. The zinc plated steel construction provides essential corrosion protection for outdoor equipment, agricultural machinery, and construction assemblies exposed to environmental elements. Its 1"-8 UNC coarse threading enables faster installation in steel frameworks and cast components while the partially threaded shank design prevents loosening in dynamic load conditions. The external hex drive accommodates high-torque installation, making it ideal for heavy machinery maintenance, structural steel connections, and industrial manufacturing where 120,000 psi tensile strength ensures joint reliability under extreme stress.

Specification Summary & Compliance

This 6" hex head screw features precision 1"-8 UNC coarse threads with Class 2A thread fit per ASME B18.2.1 specifications, ensuring dimensional accuracy and interchangeability. Manufacturing complies with SAE J429 Grade 5 requirements for mechanical properties including Rockwell C25 hardness and 120,000 psi tensile strength. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming suitability for international industrial projects with strict compliance mandates.