S-91236A828 5/8"-11 x 12" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 60,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by zinc plating, extending service life in harsh industrial environments
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure fastening and vibration resistance
• Enhanced installation efficiency with external hex drive design allowing for high torque application using standard tools
• Reduced material stress concentration through partial threading design that maintains shank strength while providing thread flexibility
• Consistent mechanical properties with Rockwell B69 hardness ensuring dimensional stability under heavy loads
• Industry-standard compatibility with 15/16" hex head dimensions that match common wrench sizes for easy installation

Professional Applications & Engineering Value

This heavy-duty hex head screw delivers critical engineering solutions for industrial applications requiring robust fastening performance. The 5/8"-11 UNC coarse thread configuration provides superior pull-out resistance in various materials, while the zinc plated finish offers essential protection against corrosion in challenging environments. The partially threaded design concentrates strength where needed most, making it ideal for structural connections, machinery assembly, and construction applications where vibration resistance and long-term reliability are paramount. With its external hex drive and substantial 12" length, this fastener enables efficient installation in deep-set applications while maintaining the high tensile strength necessary for critical load-bearing joints.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance ensuring consistent engagement and performance. Complies with ASME B18.2.1 specifications and ASTM A307 material standards for guaranteed mechanical properties. Meets environmental compliance requirements including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The UNC coarse thread profile follows established industrial standards for reliable performance across compatible applications.