S-91263A807 5/8"-11 x 2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: Withstands up to 130,000 PSI, ensuring reliable performance in high-stress industrial applications without failure.
• Superior Corrosion Resistance: Zinc-plated alloy steel construction provides excellent protection against rust and environmental degradation, extending service life.
• Precision Thread Fit: Class 3A thread fit guarantees tight, secure fastening with minimal risk of loosening under vibration or load.
• Easy Installation & Removal: 3/8" hex drive allows for quick, tool-friendly assembly and disassembly, reducing labor time and effort.
• Optimized Head Design: Standard 82° countersink angle ensures a flush, low-profile finish that minimizes protrusion and improves safety.
• Full Thread Engagement: Fully threaded design maximizes grip and load distribution across the entire length for enhanced holding power.
• High Hardness Rating: Rockwell C37 hardness offers excellent wear resistance, maintaining thread integrity through repeated use.

Professional Applications & Engineering Value

This 5/8"-11 UNC flat head screw is engineered to address critical challenges in heavy-duty assembly, where vibration resistance, tensile load capacity, and corrosion protection are paramount. The zinc-plated alloy steel material combats harsh industrial environments, preventing fastener failure in machinery, structural frameworks, and automotive components. Its coarse thread and Class 3A fit provide superior grip in soft materials or pre-tapped holes, reducing the risk of stripping. The 82° countersink angle and flat head profile allow for seamless integration into surfaces, eliminating snag hazards and improving aerodynamic or aesthetic finishes. Ideal for construction, manufacturing, and equipment repair, this screw delivers reliable, long-term fastening solutions that minimize maintenance downtime and enhance operational safety.

Specification Summary & Compliance

This product features precise inch system measurements with a Class 3A thread fit and UNC coarse threading for optimal performance. It is manufactured in compliance with ASTM F835 specifications, ensuring consistent quality and mechanical properties. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, confirming it is free from hazardous substances and safe for use in regulated industries.