S-91970A628 3/8"-16 x 1 1/2" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Corrosion-resistant nylon construction eliminates rust concerns and provides excellent electrical insulation for sensitive applications
• External hex drive design enables high-torque installation with standard tools while preventing cam-out during tightening
• Class 2A thread fit with UNC coarse threading ensures reliable engagement and faster assembly in various materials
• Wide temperature tolerance (-40° to 185°F) maintains structural integrity across diverse environmental conditions
• Partially threaded shank design provides superior clamping force distribution and vibration resistance
• RoHS 3 compliance guarantees environmental safety and regulatory acceptance for global markets
• Lightweight plastic construction reduces overall assembly weight while providing excellent chemical resistance

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 3/8"-16 UNC nylon hex head screws solve critical challenges in electrical, automotive, and marine applications where metal fasteners would cause galvanic corrosion or electrical shorts. The black nylon plastic construction provides inherent resistance to chemicals, fuels, and UV degradation while maintaining dimensional stability across the specified temperature range from -40° to 185°F. The external hex drive combined with coarse UNC threading ensures rapid installation in plastic, wood, and soft metals without stripping threads. Particularly valuable in electrical enclosures and corrosive environments, these screws prevent conductivity issues while offering the mechanical strength needed for secure fastening in vibration-prone assemblies.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Features UNC coarse thread specification (3/8"-16) with 1" minimum thread length on a 1½" overall length partially threaded shank. Compliant with RoHS 3 (2015/863/EU) environmental standards, ensuring restriction of hazardous substances for international manufacturing requirements. The external hex drive conforms to standard tooling specifications for reliable installation across industrial applications.