S-94356A112 4-40 x 1/4" Stainless Steel Torx 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 A286 Stainless Steel material, extending service life in harsh industrial environments.
• Enhanced torque transmission with T8 Torx drive minimizes cam-out and tool slippage, allowing for precise and secure installation.
• Precise thread fit with Class 3A tolerance ensures consistent engagement and vibration resistance in critical assemblies.
• Optimized head design with an 82° countersink angle and standard flat profile allows for flush mounting and improved aerodynamics.
• Full threading along the 1/4" length provides maximum grip and load distribution across the entire fastener.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets international standards for industrial use.

Professional Applications & Engineering Value

Engineered for demanding environments, the 4-40 UNC A286 Stainless Steel Flat Head Screw delivers outstanding mechanical properties and durability. Its high tensile strength and Rockwell C24 hardness make it ideal for aerospace, automotive, and electronics applications where vibration resistance and long-term reliability are critical. The Torx T8 drive ensures efficient torque application, reducing installation errors and maintenance needs. With a coarse thread spacing and Class 3A thread fit, this screw provides secure fastening in materials prone to stress cracking, while the 82° countersink angle offers a sleek, low-profile finish. Fully compliant with industry regulations, it is a trusted choice for precision assemblies requiring consistent performance.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. It features a right-hand thread direction, coarse thread spacing, and is fully threaded for uniform load distribution. Manufactured from A286 Stainless Steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use.