S-91345A670 3/4"-10 x 4" Fiberglass Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance due to fiberglass construction, ideal for harsh or chemical environments without rust concerns
• Reliable performance across extreme temperatures from -60°F to 190°F, maintaining integrity in fluctuating industrial conditions
• Secure, precise fastening with Class 2A thread fit ensuring consistent engagement and reduced risk of cross-threading
• Easy installation and removal with external hex drive and 1 1/8" head width, compatible with standard tools for efficient maintenance
• Optimized weight-to-strength ratio from fiberglass material, reducing overall assembly weight while providing robust holding power
• Environmentally compliant manufacturing meeting RoHS 3 standards, safe for regulated industries and sustainable procurement
• Versatile partial threading design allowing unthreaded shank sections for shear resistance and precise clamp-up in assembled components

Professional Applications & Engineering Value

This 3/4"-10 UNC hex head screw delivers critical solutions for industrial applications where corrosion resistance, thermal stability, and electrical non-conductivity are paramount. The fiberglass material eliminates galvanic corrosion risks in mixed-material assemblies, common in chemical processing, marine, and electrical enclosures. Its coarse UNC thread provides rapid installation and high vibration resistance, while the partially threaded design ensures maximum clamping force is applied precisely where needed. With a temperature range of -60°F to 190°F, it maintains dimensional stability in outdoor, automotive, and HVAC systems where thermal cycling would compromise metal fasteners. The external hex drive and large head width offer superior torque transmission, preventing stripping during high-tension applications.

Specification Summary & Compliance

This fastener features 3/4"-10 UNC coarse threads with Class 2A thread fit for consistent interchangeability and reliable engagement. The partially threaded design provides a 2 3/4" minimum threaded length on a 4" overall screw. Manufacturing complies with RoHS 3 (2015/863/EU) regulations, ensuring restricted substance-free composition. The fiberglass construction delivers consistent performance within specified temperature limits without hardness rating requirements.