S-98885A203 4-40 x 3/16" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance in environments ranging from -50°F to 500°F, preventing fastener failure under extreme conditions.
• High tensile strength of 25,000 psi ensures secure, durable fastening in demanding mechanical assemblies without risk of stripping.
• Corrosion and chemical resistance inherent to PEEK plastic eliminates rust and degradation, ideal for harsh or sterile settings.
• Precise Class 2A thread fit with UNC coarse threading provides easy installation and consistent engagement, reducing assembly time and errors.
• UL 94 V-0 flammability rating enhances safety by resisting ignition and flame propagation in electrical or high-risk applications.
• Compact 3/32" hex drive and standard socket head allows for tight installations in confined spaces with standard tools.
• Compliance with RoHS 3 and REACH ensures environmental safety and global regulatory acceptance for international supply chains.

Professional Applications & Engineering Value

Engineered for precision and endurance, these PEEK plastic socket head cap screws address critical challenges in industries like aerospace, medical devices, and electronics. The beige PEEK material offers inherent resistance to chemicals, wear, and high temperatures, preventing galvanic corrosion and maintaining integrity in sterilized or aggressive environments. With a UNC coarse thread and Class 2A fit, these screws ensure quick, reliable fastening without cross-threading, while the fully threaded design provides uniform clamping force. Ideal for applications requiring lightweight, non-conductive, and high-strength fasteners, they support assemblies in extreme temperature ranges and comply with stringent industry standards, reducing maintenance and replacement costs.

Specification Summary & Compliance

This 4-40 UNC socket head cap screw features precise dimensional accuracy with a Class 2A thread fit and coarse threading for consistent performance. Manufactured in accordance with ASME B18.3 specifications, it ensures interoperability and reliability. The product is fully compliant with UL 94 V-0 for flame retardancy, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety, meeting global regulatory demands for industrial and commercial use.