S-91253A242 10-24 x 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 in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life and maintaining integrity in various industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal risk of loosening, enhancing overall joint reliability.
• Full threading with coarse UNC spacing allows for faster installation and stronger holding power in a wide range of materials.
• 82° countersink angle and flat head design provide a flush, low-profile finish that minimizes protrusion and improves safety in assembled components.
• Hex drive (1/8") offers easy installation with standard tools, reducing assembly time and improving efficiency in production lines.
• High hardness (Rockwell C39) ensures excellent wear resistance, maintaining thread integrity through repeated use and disassembly.

Professional Applications & Engineering Value

This 10-24 UNC flat head screw is engineered to address critical challenges in industrial fastening, where vibration resistance, high tensile loads, and corrosive environments are common. The black-oxide alloy steel construction provides a durable barrier against oxidation, making it ideal for machinery, automotive assemblies, and electronic enclosures. The coarse thread spacing and Class 3A fit ensure quick, secure fastening in metals and plastics, reducing installation errors and maintenance needs. Its fully threaded design and 82° countersink allow for seamless integration into precision components, offering reliable performance in applications demanding tight tolerances and long-term durability.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a precise Class 3A thread fit for consistent engagement. Dimensions include a 1/2" length, 10-24 thread size, and 1/8" hex drive. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in global markets.