S-91221A970 1/4"-20 x 7/8" Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Superior chemical resistance from glass-filled nylon construction, ideal for harsh industrial environments
• Reliable thermal performance with stable operation across -20° to 230°F temperature range
• Precise Class 2A thread fit ensures smooth assembly and consistent clamping force
• Durable hex drive design with 3/16" drive size for secure tool engagement and reduced stripping risk
• Regulatory compliance with RoHS 3 and REACH standards for global market acceptance
• Coarse UNC threading provides faster installation and better debris resistance
• Full threading along 7/8" length offers maximum adjustment flexibility in assembly applications

Professional Applications & Engineering Value

These glass-filled nylon socket head cap screws deliver exceptional value in applications where metal fasteners fail. The off-white plastic construction provides inherent corrosion resistance against chemicals, solvents, and moisture, eliminating galvanic corrosion concerns in electrical or marine environments. With 1/4"-20 UNC coarse threads and Class 2A fit, these fasteners maintain reliable performance in vibrating equipment while the hex drive compatibility ensures secure installation in confined spaces. The material's thermal stability (-20° to 230°F) makes these screws ideal for automotive components, food processing equipment, and electronic enclosures where temperature fluctuations and chemical exposure are common challenges.

Specification Summary & Compliance

This socket head cap screw features precise Class 2A thread fit with 1/4"-20 UNC coarse threads in right-hand direction. Manufactured to inch system specifications with 3/16" hex drive and standard socket head profile. The fastener is fully threaded along its 7/8" length and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances.