S-98885A104 4-40 x 3/8" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance in extreme environments from -50°F to 500°F
• High tensile strength of 25,000 psi provides secure fastening in demanding industrial applications
• Superior chemical and corrosion resistance thanks to PEEK plastic construction for extended service life
• Precision Class 2A thread fit ensures smooth installation and consistent engagement
• Hex socket drive design allows for high torque application and secure tool engagement
• Compliance with multiple industry standards including ASME B18.3, UL 94 V-0, RoHS 3, and REACH
• Coarse UNC threading provides rapid assembly and disassembly in various materials

Professional Applications & Engineering Value

These PEEK plastic socket head cap screws are engineered to solve critical challenges in high-temperature and corrosive environments where metal fasteners would fail. The 4-40 UNC coarse thread configuration combined with Class 2A thread fit ensures reliable performance in plastic, composite, and soft metal assemblies. The hex drive socket head design provides superior torque transmission while the beige PEEK material maintains dimensional stability across the entire -50°F to 500°F temperature range. Ideal for industrial applications in chemical processing, semiconductor manufacturing, aerospace components, and medical equipment where corrosion resistance and thermal performance are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 2A thread fit tolerance for consistent performance. Features 4-40 UNC coarse threads with standard socket head profile and 3/32" hex drive. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting UL 94 V-0 flammability standards. The inch system measurement ensures compatibility with North American industrial specifications and equipment.