S-91345A698 3/8"-16 x 3/4" Fiberglass Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance due to fiberglass construction, ideal for harsh chemical or marine environments where metal fasteners would degrade
• Reliable performance across extreme temperatures from -60° to 190°F, maintaining integrity in both freezing and high-heat applications
• Superior installation stability with the integrated flange design, distributing load evenly and preventing loosening under vibration
• Efficient coarse threading (UNC) provides faster driving and superior holding power in softer materials or where rapid assembly is critical
• Precise Class 2A thread fit ensures consistent, secure fastening with standard nuts and tapped holes, reducing assembly errors
• Full threading along the entire 3/4" length offers maximum grip and adjustment flexibility in various material thicknesses
• Environmental compliance with RoHS 3 guarantees safe use in regulated industries without hazardous substances

Professional Applications & Engineering Value

This gray fiberglass hex head screw is engineered to solve critical challenges in corrosive and non-conductive applications where metal fasteners fail. The fiberglass material provides inherent resistance to rust, chemicals, and electrical isolation, making it perfect for electrical enclosures, chemical processing equipment, and marine hardware. The flanged design eliminates the need for a separate washer, simplifying inventory and speeding up assembly while providing a larger bearing surface to prevent material pull-through. With its coarse UNC thread and external hex drive, it ensures quick, high-torque installation in composites and plastics, reducing assembly time and improving project efficiency in industries from wastewater treatment to telecommunications.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC coarse thread with a Class 2A thread fit for standard tolerance and reliable engagement. The fully threaded construction and dimensions, including a 9/16" head width and 3/4" length, adhere to inch-system measurement standards. It is manufactured to be RoHS 3 (2015/863/EU) Compliant, ensuring it meets strict environmental regulations for hazardous substance restrictions, making it suitable for global supply chains and eco-conscious engineering projects.