S-98885A105 4-40 x 1/2" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws
Plastic Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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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 maintains structural integrity under significant mechanical stress
- Corrosion-resistant PEEK construction eliminates rust concerns in harsh chemical or moisture-rich applications
- Precise Class 2A thread fit ensures smooth installation and secure fastening in demanding assemblies
- Standard hex drive compatibility with 3/32" tools for efficient installation and maintenance operations
- Comprehensive compliance certification including UL 94 V-0 flammability rating and environmental regulations
- Lightweight plastic alternative to metal fasteners without compromising mechanical performance
Professional Applications & Engineering Value
This PEEK plastic socket head cap screw delivers critical engineering solutions for industries requiring high-temperature resistance and chemical stability. The 4-40 UNC coarse thread configuration with Class 2A fit provides reliable engagement in plastic, composite, and metal assemblies where thermal expansion differentials exist. Engineered with fully threaded design and standard socket head profile, it addresses common challenges in electronics, aerospace, and medical equipment where corrosion resistance, electrical insulation, and weight reduction are paramount. The beige PEEK material maintains dimensional stability across extreme temperature cycles, preventing loosening or failure in critical applications where metal fasteners would corrode or conduct electricity.
Specification Summary & Compliance
This fastener features 4-40 UNC coarse threads with Class 2A thread fit tolerance for precise engagement. Manufactured to ASME B18.3 specifications with standard socket head profile and 3/32" hex drive. Compliant with UL 94 V-0 flammability standard, RoHS 3 (2015/863/EU) for hazardous substance restriction, and REACH (EC 1907/2006) regulations for chemical safety. The fully threaded design and inch system measurements ensure compatibility with standard industrial components and tooling.
