S-91870A197 8-32 x 3/4" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx T20 drive, preventing unauthorized access in security-critical installations
• Superior corrosion protection through 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, providing reliable performance under heavy loads
• Precision thread engagement with Class 3A fit and UNC coarse threading, delivering secure fastening and vibration resistance
• Optimized flush mounting featuring standard 82° countersink angle and flat head design for seamless surface integration
• Full regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
• Complete thread coverage across the 3/4" length, ensuring maximum grip strength and distribution of clamping force

Professional Applications & Engineering Value

Engineered for high-security applications where unauthorized tampering poses significant risks, these 8-32 UNC flat head screws deliver exceptional value in industrial settings. The 18-8 stainless steel construction combined with passivated finish provides outstanding corrosion resistance, making them ideal for outdoor equipment, marine environments, and chemical processing facilities. The tamper-resistant Torx T20 drive system ensures that critical fasteners remain secure in public infrastructure, electrical enclosures, and transportation systems. With Class 3A thread fit and coarse threading, these screws maintain reliable performance in vibrating machinery while the 82° countersink angle allows for flush installation in precision assemblies. The combination of 70,000 psi tensile strength and full threading provides superior clamping force distribution for demanding mechanical applications.

Specification Summary & Compliance

This security fastener maintains precision Class 3A thread fit with UNC coarse thread spacing and 82° countersink angle for optimal performance. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, ensuring environmental responsibility and workplace safety standards are met for global industrial applications.