S-91253A732 1/2"-13 x 5" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 130,000 psi ensures reliable performance in demanding industrial applications, reducing the risk of fastener failure.
• Corrosion-resistant Black-Oxide finish on Alloy Steel enhances durability and extends service life in harsh environments.
• Class 3A thread fit provides precise, tight engagement for secure connections, minimizing loosening under vibration.
• Partially threaded design with a minimum thread length of 1 1/2" allows for controlled clamping force and easier alignment in assemblies.
• 82° countersink angle and flat head profile enable a flush, low-profile installation, improving safety and aesthetics.
• Hex drive (5/16") offers efficient, high-torque installation with common tools, speeding up assembly processes.
• Compliance with ASTM F835, RoHS 3, and REACH ensures material quality and environmental safety, meeting global regulatory standards.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these 1/2"-13 UNC flat head screws address critical challenges in machinery, construction, and equipment assembly. The Black-Oxide Alloy Steel construction, combined with a Rockwell C39 hardness, provides exceptional resistance to wear and corrosion, reducing maintenance needs in corrosive or high-stress environments. The coarse thread spacing and Class 3A thread fit ensure quick, secure fastening, minimizing the risk of cross-threading and enhancing joint integrity. Ideal for use in structural frameworks, automotive components, and metal fabrications, these partially threaded screws with a 5" length offer reliable performance where vibration resistance and precise clamping are essential, supporting efficient and durable engineering solutions.

Specification Summary & Compliance

This product adheres to Class 3A thread fit and UNC coarse thread standards, with precise dimensions including a head diameter of 0.938" and length of 5". Manufactured in compliance with ASTM F835 specifications for mechanical properties, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and quality for industrial use.