S-98885A103 4-40 x 5/16" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance in extreme environments from -50° to 500°F
• High tensile strength of 25,000 psi provides superior load-bearing capability in demanding applications
• Chemical and corrosion resistance thanks to premium PEEK plastic construction
• Electrical insulation properties prevent current leakage in sensitive electronic assemblies
• Precise Class 2A thread fit ensures smooth installation and secure fastening
• Standard hex drive compatibility with 3/32" tools for efficient installation and maintenance
• Comprehensive regulatory compliance including UL 94 V-0 flammability rating for enhanced safety

Professional Applications & Engineering Value

These PEEK plastic Socket Head Cap Screws deliver critical performance advantages in demanding industrial environments where metal fasteners fail. The high-temperature resistance up to 500°F makes them ideal for aerospace, automotive, and electronic applications where thermal cycling is common. The UNC coarse threading with Class 2A fit provides reliable engagement in plastic and soft materials, while the beige color offers visual distinction in complex assemblies. As electrical insulation fasteners, they prevent galvanic corrosion and current leakage in sensitive equipment. The chemical resistance of PEEK ensures longevity in harsh chemical environments, making these screws superior alternatives to metal in corrosive applications.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with UNC coarse threads in 4-40 size and Class 2A thread fit for precise dimensional accuracy. These fully threaded screws feature standard socket head profile with 3/32" hex drive. Compliance includes UL 94 V-0 flammability rating, RoHS 3 (2015/863/EU) compliance, and REACH (EC 1907/2006) adherence, ensuring environmental responsibility and safety standards are met for global industrial applications.