S-91345A716 1/2"-13 x 1 1/2" Fiberglass Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from fiberglass construction, ideal for harsh chemical or marine environments where metal fasteners would degrade
• Excellent electrical and thermal insulation properties, preventing galvanic corrosion and current transfer in sensitive assemblies
• Wide operating temperature range from -60° to 190° F, ensuring reliable performance in both freezing and high-heat applications
• Integrated flange design distributes clamping force over a wider area, eliminating the need for a separate washer and speeding up installation
• External hex drive with 3/4" head provides a common, high-torque interface for secure tightening with standard tools
• Coarse UNC threads with Class 2A fit offer faster installation and superior resistance to vibration loosening compared to fine threads
• Full threading along the 1 1/2" length allows for maximum adjustability and grip in a variety of material thicknesses

Professional Applications & Engineering Value

This gray fiberglass hex head screw is engineered to solve critical challenges in industries like chemical processing, water treatment, and electrical enclosures where corrosion resistance and non-conductivity are paramount. The fiberglass material provides a durable, non-metallic alternative that will not rust or cause galvanic corrosion when in contact with dissimilar metals. The combination of a coarse UNC thread and a robust external hex drive ensures these screws can be installed quickly and withstand significant vibrational forces without backing out. The integrated flange enhances joint integrity by providing a larger bearing surface, making it an excellent choice for securing panels, brackets, and fixtures in demanding industrial settings.

Specification Summary & Compliance

This screw conforms to Unified National Coarse (UNC) thread standards with a precision Class 2A thread fit for consistent, reliable engagement. Key dimensional specifications include a 1/2"-13 thread size, a 1 1/2" length, a 3/4" hex head width, and a 1 1/16" flange diameter. This product is manufactured to be RoHS 3 (2015/863/EU) Compliant, ensuring it is free of specific hazardous substances for use in regulated markets.