S-91345A690 1/4"-20 x 1 1/4" Fiberglass Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance due to high-quality fiberglass construction, ideal for harsh chemical or moisture-rich environments.
• Reliable performance across extreme temperatures from -60°F to 190°F, ensuring stability in applications with fluctuating thermal conditions.
• Simplified and secure installation with an external hex drive and flanged design, providing a positive grip and eliminating the need for a separate washer.
• Guaranteed thread compatibility and consistent fit with UNC coarse threads and Class 2A thread fit, reducing cross-threading risks and speeding up assembly.
• Full-length threading for maximum grip and holding power along the entire shank, enhancing joint integrity.
• Compliance with RoHS 3 regulations, ensuring the screw is free from hazardous substances for use in sensitive and regulated industries.
• Durable and non-conductive properties of fiberglass make it perfect for electrical insulation and applications where metal fasteners are unsuitable.

Professional Applications & Engineering Value

This 1/4"-20 UNC hex head screw is engineered from robust fiberglass to address common industrial challenges where metal fasteners fail, such as galvanic corrosion, electrical conductivity, and weight reduction. The flanged design distributes clamping force evenly, preventing surface damage and loosening under vibration, which is critical in assembly lines and machinery. Its coarse thread and Class 2A fit ensure quick, reliable fastening in plastics and composite materials, reducing installation errors. Ideal for electrical enclosures, chemical processing equipment, and marine applications, this screw offers a lightweight, high-strength alternative that maintains performance in temperatures from -60°F to 190°F, providing long-term reliability in demanding conditions.

Specification Summary & Compliance

This screw adheres to Unified National Coarse (UNC) thread standards with a Class 2A thread fit for consistent dimensional accuracy and interchangeability. It is manufactured to be fully threaded with a 1/4"-20 thread size and a coarse spacing. The product is RoHS 3 (2015/863/EU) Compliant, confirming it meets stringent environmental and safety regulations for hazardous substance restrictions.