S-91345A558 1/4"-20 x 1 1/4" Fiberglass Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional temperature resistance maintains structural integrity from -60° to 190°F, ideal for extreme environment applications
• Superior corrosion resistance from fiberglass construction eliminates rust concerns in harsh industrial settings
• Excellent electrical insulation properties prevent current conduction for enhanced safety in electrical applications
• Maximum torque application capability through external hex drive design ensures secure fastening without stripping
• Reliable coarse thread engagement with UNC Class 2A fit provides quick assembly and vibration resistance
• Full threading along 1 1/4" length offers complete fastening flexibility and uniform load distribution
• Environmental compliance assurance with RoHS 3 (2015/863/EU) certification meets international regulatory standards

Professional Applications & Engineering Value

These fiberglass hex head screws deliver critical performance advantages in demanding industrial environments where metal fasteners fail. The gray fiberglass material provides inherent corrosion resistance without additional coatings, making them ideal for chemical processing, marine applications, and outdoor installations. Their electrical insulation properties solve conductivity concerns in electrical enclosures, control panels, and utility applications. The 1/4-20 UNC coarse thread configuration ensures rapid installation in various materials while the external hex drive accommodates high-torque applications without cam-out issues. Engineered for extreme temperature environments from -60° to 190°F, these fully threaded screws maintain dimensional stability where thermal expansion would compromise metal alternatives, providing reliable long-term performance in HVAC, automotive, and industrial equipment applications.

Specification Summary & Compliance

This 1/4-20 UNC hex head screw features precise Class 2A thread fit per unified thread standards, ensuring consistent engagement and reliable performance. The coarse thread spacing and right-hand thread direction follow industry-standard configurations for broad compatibility. Manufacturing complies with RoHS 3 (2015/863/EU) regulations, guaranteeing environmental safety and restricted substance compliance. The 1 1/4" length and fully threaded design provide versatile fastening solutions across multiple material thicknesses while maintaining the structural benefits of fiberglass construction throughout the entire fastener length.