S-91297A537 1/4"-20 x 1/2" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional temperature resistance from -100°F to 500°F ensures reliable performance in extreme thermal environments
• Superior chemical inertness and corrosion resistance due to PTFE material, ideal for harsh industrial settings
• Secure external hex drive design allows for easy installation and removal with standard tools
• Class 2A thread fit provides consistent, reliable engagement with standard UNC coarse threaded components
• Full threading along the 1/2" length maximizes holding power and load distribution
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global applications
• Lightweight white PTFE construction offers non-conductive, non-magnetic properties for specialized assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these PTFE plastic hex head screws deliver critical performance where metal fasteners fail. The 1/4-20 UNC coarse thread configuration ensures rapid installation and vibration resistance, while the external hex drive provides superior torque transmission without stripping. Made from premium white PTFE material, these screws maintain dimensional stability across extreme temperature cycles (-100°F to 500°F) and resist degradation from chemicals, solvents, and UV exposure. Ideal for chemical processing equipment, food machinery, electrical enclosures, and semiconductor manufacturing, they eliminate galvanic corrosion risks and provide excellent dielectric properties. The fully threaded design maximizes pull-out strength in plastic and composite materials, solving common fastening challenges in corrosive or electrically sensitive applications.

Specification Summary & Compliance

This 1/4-20 UNC hex head screw features precision Class 2A thread fit tolerances per ASME B1.1 standards, ensuring consistent mating with corresponding threaded components. The coarse thread spacing and 1/2" length provide optimal engagement depth for most applications. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, these fasteners meet international environmental and safety standards for industrial use.