S-91345A655 5/8"-11 x 5" Fiberglass Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional temperature resistance for reliable performance in environments ranging from -60°F to 190°F
• Superior corrosion resistance thanks to high-performance fiberglass construction in industrial applications
• Optimized thread engagement with UNC coarse threading and Class 2A fit for secure fastening and vibration resistance
• Enhanced installation efficiency with external hex drive and 15/16" head width for easy tool access and torque application
• Reduced material stress through partial threading design that minimizes cracking in composite materials
• Regulatory compliance assurance with RoHS 3 (2015/863/EU) compliance for environmentally conscious operations
• Versatile fastening solution combining 5" length and right-hand threading for diverse industrial assembly needs

Professional Applications & Engineering Value

These fiberglass hex head screws deliver critical performance advantages in demanding industrial environments where metal fasteners fail. The fiberglass material provides inherent corrosion resistance without protective coatings, eliminating galvanic corrosion issues when joining dissimilar materials. The UNC coarse thread configuration with Class 2A fit ensures reliable engagement in composite materials and plastics, while the partial threading design prevents stress concentration in brittle substrates. These screws maintain dimensional stability across the -60° to 190° F temperature range, making them ideal for high-temperature applications in electrical enclosures, chemical processing equipment, and outdoor infrastructure where thermal cycling would compromise metal fasteners.

Specification Summary & Compliance

This 5/8"-11 UNC hex head screw features precise Class 2A thread fit per Unified Thread Standard specifications, ensuring consistent engagement and interchangeability. The screw maintains 15/16" head width and 13/32" head height dimensions for standard tool compatibility. Manufacturing complies with RoHS 3 (2015/863/EU) environmental regulations, containing no restricted hazardous substances. The coarse thread spacing and right-hand thread direction follow established industrial standards for reliable performance in various fastening applications.