S-91970A579 5/16"-18 x 1/2" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Excellent corrosion resistance due to nylon plastic construction, ideal for humid or chemical environments
• Secure fastening with Class 2A thread fit ensuring reliable engagement and vibration resistance in assemblies
• Easy installation and removal with external hex drive design compatible with standard tools
• Broad temperature tolerance from -40°F to 185°F for stable performance in varying conditions
• Electrical insulation properties making them safe for electronic and electrical applications
• Full threading for maximum grip along the entire length, enhancing holding power
• RoHS 3 compliance ensuring environmental safety and meeting international regulatory standards

Professional Applications & Engineering Value

These nylon hex head screws are engineered to address common industrial challenges, such as corrosion in harsh environments and electrical conductivity risks. Made from durable black nylon plastic, they provide inherent resistance to moisture, chemicals, and UV exposure, reducing maintenance needs. The UNC coarse thread and Class 2A fit deliver strong, reliable fastening in materials like plastics and soft metals, minimizing loosening from vibrations. With a temperature range of -40°F to 185°F, they perform consistently in automotive, electrical enclosures, and machinery applications, while the external hex drive allows for quick installation with standard wrenches, boosting assembly efficiency.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy, ensuring compatibility and ease of use. Key specifications include a thread size of 5/16"-18, length of 1/2", and full threading for uniform load distribution. It is RoHS 3 (2015/863/EU) compliant, confirming it meets strict environmental regulations for hazardous substance restrictions, supporting safe and sustainable industrial practices.