S-91263A535 10-24 x 3/4" 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 in demanding applications.
• Superior corrosion resistance from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure mating with nuts and tapped holes, minimizing loosening from vibration.
• Full threading along the entire 3/4" length offers maximum grip and holding power, allowing for adjustable positioning and stronger connections.
• 82° countersink angle and flat head design enables flush mounting for a clean, professional finish that eliminates protrusions in assembled products.
• Hex drive (1/8") compatibility allows for easy installation with standard tools, speeding up assembly while providing high torque capability.
• High Rockwell C39 hardness maintains thread integrity and drive features during installation, preventing stripping and ensuring repeated usability.

Professional Applications & Engineering Value

These 10-24 UNC flat head screws are engineered from zinc-plated alloy steel to address critical industrial fastening challenges where vibration resistance, corrosion protection, and high clamp load capacity are essential. The coarse UNC thread design provides rapid installation and superior pull-out resistance in materials like steel, aluminum, and castings, making them ideal for machinery assembly, automotive components, and structural frameworks. The combination of full threading and Class 3A thread fit ensures consistent engagement in pre-tapped holes or with nuts, reducing the need for re-tapping and minimizing assembly errors. With their 82° countersink, they create seamless surfaces in countersunk holes, preventing snagging and improving safety in moving equipment. These screws deliver reliable performance in heavy-duty fastening applications where long-term durability and compliance with industry standards are non-negotiable.

Specification Summary & Compliance

This product meets precise dimensional standards with Class 3A thread fit for unified coarse (UNC) threads, ensuring tight tolerances and reliable performance. Manufacturing and material specifications comply with ASTM F835 for mechanical properties and quality assurance. The screws are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substance restrictions.