S-91253A022 10-32 x 2 1/2" 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 provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal play, ideal for applications requiring high vibration resistance.
• Fully threaded design offers consistent holding power along the entire 2 1/2" length, enhancing assembly stability.
• 82° countersink angle with a flat head allows for a flush, low-profile installation, improving aesthetics and safety in finished products.
• Hex drive compatibility enables easy installation and removal with standard tools, speeding up assembly and maintenance processes.
• Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to strict quality and environmental standards, supporting global supply chain requirements.

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered from black-oxide alloy steel to address common industrial challenges such as corrosion, vibration loosening, and high mechanical stress. The fine UNF threads and Class 3A fit provide superior grip in precision assemblies, reducing the need for frequent retightening in machinery, automotive, and aerospace applications. The fully threaded design ensures uniform load distribution, while the 82° countersink angle facilitates seamless integration into angled surfaces, minimizing protrusion risks. Ideal for demanding environments, these screws enhance durability and reliability, backed by a Rockwell C39 hardness that resists wear over time.

Specification Summary & Compliance

This product features precise inch system measurements with a Class 3A thread fit per UNF standards, ensuring tight tolerances for secure fastening. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances. The manufacturing adheres to defined parameters, including a right-hand thread direction and fine thread spacing, supporting consistent performance in industrial applications.