S-96660A151 4-40 x 1/4" Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI for reliable performance in demanding applications.
• Class 3A thread fit ensures precise, secure fastening with minimal risk of loosening.
• Zinc-plated alloy steel construction provides excellent corrosion resistance and durability.
• Integrated flange distributes load evenly, reducing surface damage and improving joint integrity.
• Hex drive design allows for high-torque installation with standard tools, speeding up assembly.
• Fully threaded coarse UNC pattern offers quick engagement and strong holding power in various materials.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards.

Professional Applications & Engineering Value

This 4-40 UNC Class 3A zinc-plated alloy steel rounded head screw is engineered to address common industrial challenges such as vibration-induced loosening and material fatigue. The coarse thread and fully threaded design enable rapid installation and robust fastening in metal, plastic, and composite assemblies, reducing assembly time while maintaining high tensile strength. The zinc plating offers a protective barrier against rust and corrosion, extending service life in harsh environments. Ideal for electronics, machinery, and automotive applications, this flanged screw with a hex drive ensures consistent clamping force, preventing joint failure and minimizing maintenance needs.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 3A thread fit for tight tolerances and reliable performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured from alloy steel with a hardness of Rockwell C32, it is designed for precision and durability in industrial fastening applications.