S-91244A587 5/16"-18 x 1 1/2" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance eliminates rust and degradation in harsh environments where metal fasteners fail
• Excellent electrical insulation properties prevent current leakage and short circuits in electrical applications
• Wide temperature tolerance from -40° to 185°F ensures reliable performance across diverse operating conditions
• Easy installation and removal with standard 1/2" external hex head design compatible with common tools
• Precise Class 2A thread fit provides consistent engagement and reliable fastening performance
• RoHS 3 compliance ensures environmental safety and regulatory acceptance for global applications
• Lightweight nylon construction reduces overall assembly weight while maintaining structural integrity

Professional Applications & Engineering Value

This 5/16"-18 UNC nylon plastic hex head screw delivers critical engineering advantages in applications where metal fasteners prove problematic. The off-white nylon material provides inherent corrosion resistance, making it ideal for chemical processing, marine environments, and outdoor applications where moisture and corrosive agents degrade metal components. Its excellent electrical insulation properties make it the preferred choice for electrical enclosures, control panels, and electronic assemblies where current isolation is paramount. The partially threaded design with coarse UNC threading ensures secure fastening in plastic assemblies and softer materials, while the external hex drive accommodates standard installation tools for efficient assembly operations across manufacturing and maintenance applications.

Specification Summary & Compliance

This fastener features 5/16"-18 UNC coarse threads with Class 2A thread fit for consistent engagement and reliable performance. The partially threaded design provides 7/8" minimum thread length on a 1 1/2" overall length body. Manufactured from high-quality nylon plastic with off-white coloration, this screw maintains dimensional stability across its specified temperature range of -40° to 185°F. The product is fully RoHS 3 (2015/863/EU) compliant, meeting international environmental standards for restricted substances, making it suitable for global supply chains and regulated industries requiring documented material compliance.