S-90517A213 8-32 x 3/4" ASME B18.3 Tamper-Resistant Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior tamper resistance with a specialized hex drive that deters unauthorized removal, ideal for public or high-security installations.
• Excellent corrosion resistance provided by 18-8 Stainless Steel and a passivated finish, ensuring long-term reliability in harsh environments.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for dependable performance under heavy loads.
• Precise and secure fastening due to the Class 3A thread fit and UNC coarse thread spacing, reducing the risk of cross-threading and loosening.
• Flush and professional installation with a standard flat head and 82° countersink angle, creating a smooth surface finish.
• Full threading for maximum grip along the entire 3/4" length, providing superior holding power in various materials.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

These 8-32 UNC flat head screws are engineered to address critical challenges in industrial and security-focused applications. The combination of 18-8 Stainless Steel and a passivated finish offers exceptional resistance to rust and corrosion, making them suitable for outdoor equipment, marine hardware, and chemical processing facilities. The tamper-resistant hex drive is a key security feature, preventing vandalism and unauthorized access in public infrastructure, electrical enclosures, and machinery. The Class 3A thread fit and coarse thread spacing ensure quick assembly and a reliable, vibration-resistant connection, reducing maintenance needs and downtime. Fully threaded for maximum engagement, these screws provide a robust fastening solution for metal, plastic, and wood assemblies where a flush finish and high security are paramount.

Specification Summary & Compliance

This product adheres to strict dimensional and performance criteria, including a Class 3A thread fit for superior precision and a coarse (UNC) thread spacing. Manufacturing and quality are governed by the ASME B18.3 specification. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free of hazardous substances and safe for use in various markets.