S-90517A214 8-32 x 1" ASME B18.3 Tamper-Resistant Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized hex drive design to prevent unauthorized removal in high-security applications
• Superior corrosion resistance through 18-8 stainless steel construction and passivated surface treatment for extended service life
• Maximum thread engagement with full threading and Class 3A fit ensuring reliable fastening in demanding environments
• Optimized flush mounting with standard 82° countersink angle and flat head profile for smooth surface finishes
• High mechanical performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Regulatory compliance assurance meeting ASME B18.3 standards while being RoHS 3 and REACH compliant
• Secure industrial fastening combining right-hand UNC coarse threads with tamper-resistant drive for vibration-resistant assemblies

Professional Applications & Engineering Value

Engineered for high-security industrial applications, these 8-32 UNC flat head tamper-resistant hex screws address critical challenges in public infrastructure, machinery guarding, and access control systems. The 18-8 stainless steel material with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for harsh environments including outdoor installations and manufacturing facilities. The tamper-resistant hex drive specifically prevents unauthorized access while maintaining the installation efficiency of standard hex tools. With Class 3A thread fit and coarse threading, these screws deliver superior holding power in metal, plastic, and composite materials, reducing the risk of vibration-induced loosening in dynamic applications.

Specification Summary & Compliance

This 1" long flat head screw features precision 8-32 UNC coarse threads with Class 3A fit for optimal engagement and tolerance control. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance standards. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety. The 82° countersink angle conforms to industry standards for proper seating in chamfered holes, while the fully threaded design ensures maximum grip length across the entire fastener.