S-91345A582 5/16"-18 x 1 1/2" Fiberglass Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to premium fiberglass construction, eliminating rust issues in demanding environments
• Excellent temperature stability with reliable performance from -60°F to 190°F, ideal for thermal cycling applications
• Precise Class 2A thread fit ensures smooth installation and secure fastening with UNC coarse threading
• Easy installation and removal with standard 1/2" external hex head design for common tool compatibility
• Optimized load distribution through partial threading design that concentrates strength where needed most
• Environmental compliance assurance with RoHS 3 certification for sustainable manufacturing standards
• Dimensional consistency with precise 5/16"-18 UNC coarse threads maintaining uniform engagement

Professional Applications & Engineering Value

These fiberglass hex head screws deliver exceptional value in corrosive and electrically sensitive applications where metal fasteners fail. The gray fiberglass material provides inherent resistance to chemicals, moisture, and galvanic corrosion while maintaining electrical insulation properties. With UNC coarse threading and Class 2A thread fit, these screws offer rapid installation in composite materials, plastics, and wood without stripping threads. The partial threading design concentrates the clamping force precisely where needed, preventing material crushing in delicate assemblies. Ideal for electrical enclosures, chemical processing equipment, marine applications, and outdoor structures, these RoHS 3 compliant screws withstand temperature extremes from -60°F to 190°F without degradation, ensuring long-term reliability in harsh industrial environments.

Specification Summary & Compliance

This 5/16"-18 UNC coarse thread hex head screw features precise Class 2A thread fit per Unified Thread Standard specifications, ensuring dimensional accuracy and proper engagement. The fastener maintains 0.3125" thread diameter with 1-1/2" overall length and 1-1/4" minimum thread length. Manufacturing complies with RoHS 3 (2015/863/EU) regulations, guaranteeing environmental safety and restricted substance compliance. The external hex drive with 1/2" head width and 7/32" head height provides standard tool compatibility for efficient installation across industrial applications.