S-91870A194 8-32 x 1/2" 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 that deters unauthorized access in high-security applications
• Superior corrosion protection through 18-8 stainless steel construction and passivated surface treatment for extended service life
• Reliable thread engagement with Class 3A fit and UNC coarse threading ensuring vibration-resistant fastening
• Optimized flush mounting featuring standard 82° countersink angle for seamless installation in precision assemblies
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding environments
• Full-threaded design providing maximum grip length and load distribution across the entire fastener
• Regulatory compliance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for high-security industrial applications, these 8-32 UNC flat head screws address critical challenges in access control and vandal-resistant assemblies. The tamper-resistant Torx T20 drive prevents unauthorized disassembly while maintaining precise torque transmission during installation. Manufactured from 18-8 stainless steel with passivated finish, these fasteners deliver exceptional resistance to corrosion and chemical exposure in harsh environments. The Class 3A thread fit ensures consistent engagement in threaded holes, reducing the risk of cross-threading while providing reliable clamping force. Ideal for electronic enclosures, public infrastructure, medical equipment, and transportation systems where security and durability are paramount. The fully threaded design maximizes contact surface area, distributing mechanical loads evenly across the entire fastener length for enhanced joint integrity.

Specification Summary & Compliance

This security fastener maintains precision Class 3A thread fit with UNC coarse threading (8-32 size) and right-hand thread direction. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance standards. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations regarding hazardous substances, ensuring environmental responsibility in industrial supply chains.