S-91263A505 6-32 x 3/16" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 PSI ensures reliable, long-lasting fastening in demanding applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc-plated alloy steel material protects against rust and extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides a tighter, more secure engagement, minimizing the chance of loosening under vibration and improving assembly quality.
• Undercut flat head design with an 82° countersink angle allows for a flush, low-profile finish, enhancing aesthetics and preventing snagging.
• High Rockwell C39 hardness offers excellent wear resistance and durability, maintaining thread integrity through repeated use.
• Full threading along the 3/16" length ensures maximum grip and holding power across the entire fastener.
• Compliance with ASTM F835, RoHS 3, and REACH guarantees material quality and environmental safety, meeting strict industry and regulatory standards.

Professional Applications & Engineering Value

These 6-32 UNC flat head screws are engineered to solve critical fastening challenges in industrial and engineering settings. The zinc-plated alloy steel construction provides a robust barrier against corrosion, making them ideal for machinery, electronics, and outdoor equipment where moisture and chemicals are present. The undercut flat head profile and 82° countersink angle ensure a seamless, flush mount, which is essential for applications requiring aerodynamic surfaces or safety, such as in automotive panels and enclosures. With a coarse thread spacing and Class 3A thread fit, these screws offer quick assembly and high resistance to vibration loosening, reducing maintenance downtime. The hex drive style allows for efficient installation with standard tools, streamlining production lines and ensuring consistent torque application for reliable performance in high-stress environments.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads for rapid installation. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. Manufactured in the inch system, it features a right-hand thread direction and is fully threaded for uniform strength.