S-91253A845 3/4"-10 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 heavy loads, reducing the risk of fastener failure in demanding applications.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance and a durable finish, extending service life in harsh industrial environments.
• Class 3A thread fit guarantees precise, tight tolerances for secure fastening and vibration resistance, minimizing loosening over time.
• 82° countersink angle and flat head design allows for flush mounting, improving aesthetics and safety by eliminating protrusions.
• Fully threaded UNC coarse thread enables quick installation and strong grip in a variety of materials, saving assembly time and labor costs.
• Hex drive (1/2") offers easy torque application with standard tools, enhancing installation efficiency and reducing slippage risks.
• Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to industry standards for safety and environmental regulations, supporting sustainable procurement.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 3/4"-10 UNC flat head screw addresses common challenges like vibration-induced loosening and material fatigue. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, provides superior durability against wear and environmental exposure, making it ideal for machinery, construction, and automotive assemblies. Its fully threaded right-hand coarse thread ensures rapid, secure fastening in metals and composites, while the 82° countersink angle facilitates seamless integration for streamlined surfaces. By meeting rigorous standards, it delivers consistent performance in high-stress environments, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw adheres to precise inch system measurements with a Class 3A thread fit for tight tolerances, following UNC coarse thread standards. It complies with ASTM F835 specifications for mechanical properties, and is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets environmental and safety regulations without hazardous substances.