S-98885A125 1/4"-20 x 5/8" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional temperature resistance maintains structural integrity from -50°F to 500°F for reliable performance in extreme thermal environments
• High tensile strength of 25,000 psi delivers robust fastening capability comparable to metal alternatives in demanding applications
• UL 94 V-0 flammability rating provides critical fire safety compliance for electrical and industrial applications
• Chemical and corrosion resistant PEEK construction ensures long-term durability in harsh chemical environments where metal fasteners would degrade
• Precision Class 2A thread fit guarantees consistent engagement and reliable clamping force in assembly operations
• 3/16" hex drive design enables secure tool engagement and high torque application without stripping concerns
• RoHS 3 and REACH compliance meets international environmental standards for restricted substances

Professional Applications & Engineering Value

These PEEK plastic socket head cap screws solve critical engineering challenges in industries where metal fasteners fail due to corrosion, electrical conductivity, or thermal limitations. The 1/4"-20 UNC coarse thread configuration with Class 2A fit ensures rapid installation and vibration resistance in automated assembly environments. Engineered for high-temperature applications up to 500°F, these fasteners maintain dimensional stability in thermal cycling conditions that would cause traditional plastics to deform. The beige PEEK material offers excellent chemical resistance against aggressive solvents, acids, and bases, making them ideal for chemical processing equipment, semiconductor manufacturing, and medical devices where corrosion resistance and electrical insulation are paramount. The socket head design with 3/16" hex drive provides reliable torque transmission in confined spaces where traditional screw heads cannot access.

Specification Summary & Compliance

These socket head cap screws feature precision UNC coarse threads with Class 2A thread fit tolerance, ensuring consistent engagement and reliable performance. Manufactured to ASME B18.3 specifications for dimensional accuracy and mechanical properties. The 5/8" length and 1/4"-20 thread size provide standardized compatibility with industry components. Compliance includes UL 94 V-0 flammability rating for fire safety, RoHS 3 (2015/863/EU) compliance for restricted substances, and REACH (EC 1907/2006) compliance for chemical safety regulations.