S-99091A539 1/4"-20 x 5/8" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with durable Nylon material, eliminating rust concerns in humid or chemical environments
• Excellent electrical insulation properties for safe use in electronic assemblies and electrical enclosures
• Wide temperature tolerance from -40° to 185°F maintains performance in extreme industrial conditions
• Easy installation and removal with external hex drive design providing reliable torque transfer
• Precise UNC coarse threading (Class 2A fit) ensures smooth engagement and consistent fastening performance
• Full threading along 5/8" length offers maximum grip strength and adjustment flexibility
• RoHS 3 compliance meets environmental regulations for sensitive industrial and electronic applications

Professional Applications & Engineering Value

These 1/4-20 nylon hex head screws deliver critical engineering advantages where metal fasteners fail. The black nylon construction provides inherent corrosion resistance, eliminating galvanic corrosion risks in mixed-material assemblies while offering permanent electrical insulation for electronic components. The UNC coarse thread profile ensures rapid installation and reliable performance in plastic and soft material applications, resisting vibration-induced loosening. With external hex drive compatibility standard tools, these screws maintain structural integrity across the full -40° to 185°F temperature range, making them ideal for outdoor equipment, electrical enclosures, and industrial machinery where environmental factors compromise metal alternatives.

Specification Summary & Compliance

Manufactured to precise UNC coarse thread standards with Class 2A thread fit for consistent engagement. Dimensions include 1/4"-20 thread size, 5/8" length, 3/8" head width, and 3/16" head height. Fully compliant with RoHS 3 (2015/863/EU) environmental regulations, containing no restricted hazardous substances. Suitable for industrial applications requiring non-conductive, non-magnetic, and chemically resistant plastic fasteners.