S-91355A171 10-32 x 1/4" Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coating, extending service life in demanding industrial environments.
• High tensile strength of 120,000 psi ensures reliable performance under heavy loads and vibration.
• Precise Class 3A thread fit provides excellent engagement and reduces the risk of cross-threading during assembly.
• Flanged button head design offers a wider bearing surface for secure fastening and a low-profile, finished appearance.
• Fine UNF threading delivers better adjustment control and higher resistance to loosening compared to coarse threads.
• 1/8" hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
• Full compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.

Professional Applications & Engineering Value

Engineered for precision and durability, this 10-32 UNF Class 3A Black-Oxide Alloy Steel Rounded Head Screw addresses common challenges in industrial assembly, such as material fatigue and corrosion. The fine thread and Class 3A fit provide tight tolerances, minimizing backlash in machinery and electronic enclosures. Its flanged button head distributes clamping force evenly, preventing surface damage and maintaining integrity in high-stress applications. With a Rockwell C32 hardness and robust alloy steel construction, it withstands repetitive loads and harsh conditions, making it ideal for automotive, aerospace, and precision equipment where reliability is critical.

Specification Summary & Compliance

This screw adheres to UNF thread standards with a Class 3A thread fit for high precision. Dimensions include a 10-32 thread size, 1/4" length, and 0.406" flange diameter. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.