S-91970A535 1/4"-20 x 3/8" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Excellent corrosion resistance due to black nylon plastic construction, eliminating rust in humid or chemical environments.
• Secure and reliable fastening with UNC coarse threading and Class 2A thread fit, ensuring easy assembly and vibration resistance.
• Broad temperature tolerance from -40° to 185°F, maintaining integrity in varied operational conditions.
• High torque application capability with an external hex head design, allowing for efficient installation using standard tools.
• Maximum grip and load distribution through a fully threaded 3/8" length, enhancing holding power in assemblies.
• Environmental and regulatory safety with RoHS 3 compliance, supporting sustainable and safe manufacturing practices.
• Lightweight and non-conductive properties, ideal for electrical insulation and reducing overall component weight.

Professional Applications & Engineering Value

This 1/4-20 x 3/8" black nylon hex head screw is engineered to address common industrial challenges such as corrosion, electrical conductivity, and weight management. Made from durable nylon plastic, it provides inherent resistance to moisture, chemicals, and oxidation, making it perfect for outdoor equipment, marine applications, and electronics where metal fasteners fail. The UNC coarse thread and Class 2A fit ensure quick, reliable installations with reduced risk of cross-threading, while the external hex drive allows for high-torque tightening without slippage. Its fully threaded design maximizes surface contact, distributing loads evenly to prevent loosening under vibration. Commonly used in industrial plastic fastening for enclosures, panels, and machinery, this screw offers a lightweight, non-corrosive alternative that enhances product longevity and safety in demanding environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a 1/4"-20 UNC coarse thread with Class 2A thread fit for consistent accuracy and ease of assembly. It is fully compliant with RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances. The specifications cover a thread diameter of 0.25", length of 3/8", and a temperature range of -40° to 185°F, supporting reliable performance across various applications without additional certifications.