S-91345A726 1/2"-13 x 3 1/2" Fiberglass Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from fiberglass construction, ideal for harsh chemical and moisture-rich environments where metal fasteners would degrade.
• Excellent thermal stability with a wide operating range from -60°F to 190°F, ensuring reliable performance in fluctuating temperatures.
• Enhanced load distribution and increased bearing surface provided by the integrated 1 1/16" flange, reducing the risk of surface damage and loosening.
• Secure and precise assembly with a Class 2A thread fit and UNC coarse thread profile, enabling faster installation and reduced cross-threading.
• Robust external hex drive and 3/4" head width for high-torque application and easy installation with standard tools.
• Optimized for specific engagement with a partially threaded design, providing strong clamping force where needed without unnecessary threading.
• Compliance with environmental standards as RoHS 3 (2015/863/EU) compliant, ensuring safety and meeting regulatory requirements for industrial components.

Professional Applications & Engineering Value

This gray fiberglass hex head screw is engineered to solve critical challenges in demanding sectors like chemical processing, water treatment, and electrical enclosures, where corrosion resistance and non-conductivity are paramount. The fiberglass material inherently resists rust and galvanic corrosion, eliminating failures common with metallic fasteners. The UNC coarse thread and Class 2A thread fit ensure rapid, reliable assembly even in vibrating environments, while the flanged design increases stability and distributes clamp load over a wider area, preventing material crushing. Its ability to perform across a broad temperature range from -60°F to 190°F makes it a versatile choice for outdoor, HVAC, and industrial equipment exposed to thermal cycling, ensuring long-term industrial reliability without compromising on safety or performance.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a 1/2"-13 thread size and a precision Class 2A thread fit for consistent dimensional accuracy. The screw features a partially threaded shank with a minimum thread length of 2 1/2" and an overall length of 3 1/2". It is manufactured to be RoHS 3 (2015/863/EU) compliant, confirming the absence of restricted hazardous substances and aligning with global environmental and safety directives for industrial components.