S-99477A640 1/4"-20 x 1" Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Superior chemical resistance for reliable performance in harsh environments without corrosion or degradation
• Wide temperature tolerance (-20° to 210° F) ensures stable operation in varying thermal conditions
• 3/16" hex drive design provides secure, slip-resistant installation with standard tools
• Class 2A thread fit with UNC coarse threading delivers consistent engagement and vibration resistance
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory acceptance
• Lightweight polypropylene construction reduces assembly weight while maintaining durability
• Fully threaded shank offers maximum adjustability and holding power across the entire length

Professional Applications & Engineering Value

Engineered for demanding electrical enclosures, chemical processing equipment, and food-grade machinery, this polypropylene socket head cap screw solves critical challenges where metal fasteners fail. Its non-conductive properties prevent electrical shorts, while the inherent corrosion resistance eliminates galvanic reactions in moist or chemically aggressive environments. The UNC coarse thread profile ensures rapid installation and reliable performance in plastic assemblies, reducing stripping risks. With a temperature range from -20° to 210° F, it maintains dimensional stability in both freezing and elevated temperature applications, making it ideal for HVAC systems, laboratory instruments, and outdoor industrial controls where thermal cycling occurs.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per UNC standards with 1/4"-20 coarse threading and 1" fully threaded length. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets stringent environmental and safety requirements for industrial components. The inch system measurements ensure compatibility with North American machinery specifications.