S-98885A128 1/4"-20 x 1" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional thermal stability with a wide operating range from -50° to 500°F, ensuring reliable performance in extreme temperature environments without degradation
• High tensile strength of 25,000 psi provides robust fastening capability comparable to some metal screws while maintaining lightweight plastic advantages
• Superior chemical and corrosion resistance inherent to PEEK material eliminates rust concerns and extends service life in harsh industrial settings
• Precision Class 2A UNC coarse threads deliver consistent engagement and reliable clamping force in demanding applications
• UL 94 V-0 flammability rating ensures fire safety compliance for electrical and high-temperature applications
• Standard hex socket drive design with 3/16" drive size enables secure installation and removal with common industrial tools
• Full thread coverage along the 1" length maximizes adjustability and provides uniform stress distribution

Professional Applications & Engineering Value

These PEEK plastic socket head cap screws solve critical engineering challenges in industries where high-temperature resistance, chemical compatibility, and electrical insulation are paramount. The 1/4"-20 UNC coarse thread configuration with Class 2A fit ensures reliable performance in vibration-prone environments while maintaining precise dimensional stability. The beige PEEK material offers exceptional mechanical properties that withstand thermal cycling from -50° to 500°F, making these industrial plastic screws ideal for aerospace, semiconductor manufacturing, chemical processing, and medical equipment applications. Their corrosion-resistant nature eliminates galvanic compatibility issues when mating with dissimilar metals, while the hex drive socket head design provides secure installation in confined spaces common in complex assemblies.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with precision Class 2A thread fit and UNC coarse threads for consistent performance. These fully threaded fasteners feature a 1/4"-20 thread size with 3/16" hex drive and standard socket head profile. Compliance includes UL 94 V-0 flammability rating, RoHS 3 (2015/863/EU) compliance for hazardous substance restriction, and REACH (EC 1907/2006) compliance addressing chemical safety requirements.