S-91253A245 10-24 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
• Superior holding power with 130,000 psi tensile strength and Rockwell C39 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A fit ensuring consistent, secure fastening in critical applications
• Easy installation and removal with 1/8" hex drive providing positive torque transmission and reduced tool slippage
• Optimal flush mounting with standard 82° countersink angle that seats perfectly in chamfered holes
• Enhanced assembly efficiency with coarse UNC threading that reduces cross-threading and speeds installation
• Full regulatory compliance meeting ASTM F835, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

These 10-24 UNC flat head screws deliver exceptional engineering value in demanding industrial applications where vibration resistance, material strength, and regulatory compliance are critical. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the high tensile strength needed for structural assemblies, machinery frames, and heavy equipment. The fully threaded design with coarse threading ensures maximum grip length and reduces the risk of stripping in softer materials. The hex drive configuration allows for high-torque installation without cam-out, making these flat head fasteners ideal for applications requiring flush mounting in automotive, aerospace, and industrial manufacturing where space constraints and surface finish are important considerations.

Specification Summary & Compliance

This 3/4" flat head screw features precision Class 3A thread fit with UNC coarse threading standards, ensuring tight tolerances and reliable performance. Manufacturing specifications comply with ASTM F835 standards for mechanical properties and dimensional requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components. The combination of precise dimensional control (82° countersink angle, 0.411" head diameter) and verified material properties (Rockwell C39 hardness, 130,000 psi tensile strength) ensures consistent performance across production runs.