S-91345A650 5/8"-11 x 4" Fiberglass Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality fiberglass material, ideal for harsh industrial environments without rust or degradation.
• Excellent thermal stability with a wide operating range of -60° to 190°F, ensuring reliable performance in extreme temperature applications.
• Maximum holding power with coarse UNC threading and Class 2A thread fit, providing secure fastening and vibration resistance.
• Easy installation and removal thanks to the external hex drive design, compatible with standard wrenches for efficient assembly.
• Full threading along the 4" length offers versatile grip and uniform load distribution across connected materials.
• Environmental and regulatory safety with RoHS 3 compliance, meeting strict standards for hazardous substance restrictions.
• Durable and lightweight fiberglass construction reduces overall weight while maintaining strength, perfect for applications where metal fasteners may fail.

Professional Applications & Engineering Value

This fiberglass hex head screw is engineered to address common challenges in demanding sectors such as chemical processing, marine, and electrical enclosures, where corrosion resistance and thermal stability are critical. The gray fiberglass material inherently resists moisture, chemicals, and UV exposure, eliminating the risk of galvanic corrosion often seen with metal fasteners. With a coarse UNC thread and Class 2A thread fit, it ensures quick assembly and robust performance in high-vibration environments, reducing maintenance needs. The external hex drive allows for straightforward installation using common tools, speeding up projects in industrial maintenance, HVAC systems, and structural applications where reliability under extreme temperatures from -60° to 190°F is essential.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a size of 5/8"-11 and Class 2A thread fit for precise dimensional accuracy and interchangeability. It is fully threaded with a length of 4", head height of 13/32", and head width of 15/16" for consistent performance. Compliance with RoHS 3 (2015/863/EU) ensures it meets environmental regulations, free from restricted hazardous substances, making it suitable for global industrial use.