S-91263A534 10-24 x 5/8" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc plating protects against rust and degradation, extending service life in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in critical assemblies.
• Convenient hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Full threading along the 5/8" length ensures maximum grip and holding power across the entire fastener.
• High Rockwell C39 hardness offers excellent wear resistance, maintaining thread integrity through repeated use.
• 82° countersink angle enables a flush finish when installed, ideal for applications requiring a smooth surface profile.

Professional Applications & Engineering Value

These 10-24 UNC flat head screws are engineered to address common industrial fastening challenges, such as vibration loosening and environmental corrosion. The zinc-plated alloy steel construction provides a durable barrier against moisture and chemicals, making them suitable for outdoor equipment, machinery, and automotive assemblies. The coarse thread spacing and Class 3A thread fit ensure quick installation and a secure hold in materials like metal and hard plastics, reducing the need for frequent maintenance. With a hex drive for straightforward tool engagement, these screws streamline assembly processes in production lines, while the fully threaded design maximizes load distribution, preventing joint failure in high-vibration environments.

Specification Summary & Compliance

This fastener adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are upheld. The right-hand thread direction and coarse thread spacing align with industry norms for reliable performance in various applications.