S-91970A544 1/4"-20 x 1 1/4" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance ensures long-term reliability in harsh environments without rust or degradation
• Excellent electrical insulation properties prevent current leakage and short circuits in electrical applications
• Lightweight nylon construction reduces overall assembly weight while maintaining structural integrity
• External hex drive design provides secure tool engagement for straightforward installation and removal
• Wide temperature tolerance from -40° to 185°F maintains performance across diverse operating conditions
• RoHS 3 compliance guarantees environmental safety and regulatory adherence for global manufacturing
• Class 2A thread fit with UNC coarse threading ensures reliable engagement and vibration resistance

Professional Applications & Engineering Value

These nylon hex head screws deliver critical engineering advantages where metal fasteners fail. The black nylon plastic construction eliminates galvanic corrosion in mixed-material assemblies while providing essential electrical insulation for sensitive components. The UNC coarse thread profile with Class 2A fit maintains secure fastening even under vibration, making them ideal for electrical enclosures, automotive components, and industrial equipment. The partially threaded design concentrates engagement where needed, while the external hex drive accommodates standard tools for efficient installation in confined spaces. These non-conductive fasteners solve conductivity concerns in electronics while offering chemical resistance in processing environments.

Specification Summary & Compliance

This 1/4"-20 x 1-1/4" nylon hex head screw features UNC coarse threading with Class 2A thread fit for precision engagement. The partially threaded design provides 3/4" minimum thread length with external hex drive (7/16" head width) for standard tool compatibility. Manufactured from durable nylon plastic in black finish, these screws maintain dimensional stability across the specified -40° to 185°F temperature range. Fully compliant with RoHS 3 (2015/863/EU) environmental regulations for restricted substances.