S-91266A247 10-24 x 1" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking: Nylon patch thread locker maintains secure fastening from -65° to 250°F, preventing loosening in dynamic industrial environments
• Exceptional load-bearing capacity: 130,000 psi tensile strength and Rockwell C39 hardness ensure reliable performance under high-stress conditions
• Precision thread engagement: Class 3A thread fit provides superior mating with female threads for reduced assembly variability
• Corrosion-resistant protection: Black-oxide coating on alloy steel extends service life in demanding applications
• Optimized flush mounting: Standard 82° countersink angle and flat head design create smooth surface finishes
• Enhanced installation efficiency: Hex drive (1/8") enables high-torque application with standard tools
• Full-thread engagement: 1" length with complete UNC coarse threading maximizes grip range and holding power

Professional Applications & Engineering Value

These 10-24 UNC flat head screws deliver critical vibration resistance and thermal stability for machinery, automotive, and equipment manufacturing applications. The black-oxide alloy steel construction combined with nylon patch thread locking technology addresses common failure points in vibrating assemblies, maintaining clamp load integrity across temperature fluctuations from -65° to 250°F. The coarse UNC threading with Class 3A fit ensures rapid installation and reliable engagement in both soft and hard materials, while the 82° countersink provides clean, flush mounting in precision assemblies. Engineered to withstand repetitive stress cycles, these fully threaded screws offer consistent performance in high-vibration environments where fastener integrity is non-negotiable.

Specification Summary & Compliance

Manufactured to ASTM F835 specifications with Class 3A thread fit tolerance for precision assembly. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features UNC coarse threading (10-24) with complete threading along the 1" length, 82° standard countersink angle, and 0.411" head diameter. The black-oxide surface treatment provides corrosion protection while maintaining dimensional stability across the specified temperature range.