S-91221A960 1/4"-20 x 5/8" Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with glass-filled nylon construction, eliminating rust and galvanic compatibility issues in harsh environments.
• Reliable performance across wide temperature ranges from -20° to 230° F, maintaining integrity in varied operational conditions.
• Secure and efficient installation with a standard 3/16" hex drive socket head, providing high torque capability and reducing stripping risk.
• Precise and durable thread engagement thanks to UNC coarse threads with Class 2A fit, ensuring consistent clamping force and vibration resistance.
• Lightweight and non-conductive properties ideal for electrical and weight-sensitive applications without compromising strength.
• Full regulatory compliance with RoHS 3 and REACH standards, guaranteeing safety and environmental responsibility for global supply chains.
• Versatile fully threaded design allows for adjustable positioning and uniform load distribution along the entire 5/8" length.

Professional Applications & Engineering Value

This glass-filled nylon socket head cap screw is engineered to address common industrial challenges like corrosion, electrical insulation, and weight reduction. The 1/4-20 UNC coarse thread and Class 2A thread fit provide excellent holding power and ease of assembly in plastics, composites, and light metal components, reducing the risk of cross-threading. Its off-white color and plastic material make it ideal for visible assemblies in consumer electronics, automotive interiors, and food processing equipment where metal detection or contamination is a concern. The hex drive design ensures reliable torque transmission, while the material's inherent properties resist chemicals and moisture, extending service life in demanding environments without the need for additional coatings or treatments.

Specification Summary & Compliance

This fastener adheres to inch system dimensions with a 1/4"-20 UNC coarse thread and Class 2A thread fit for consistent dimensional accuracy. It is manufactured from glass-filled nylon plastic and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.