S-91870A206 8-32 x 1 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized T20 Torx 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
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under stress
• Precise thread engagement with Class 3A fit and UNC coarse threading ensuring secure fastening in demanding industrial environments
• Full-threaded design providing maximum grip length and superior holding power across the entire fastener length
• Standardized flat head profile with 82° countersink angle for flush mounting and clean aesthetic finish
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 8-32 UNC flat head screws with tamper-resistant Torx drive address critical security and reliability challenges in industrial applications. The combination of 18-8 stainless steel material and passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for harsh environments including outdoor equipment, marine applications, and chemical processing facilities. The T20 drive system prevents unauthorized tampering while allowing authorized maintenance with standard tools, solving security concerns in public infrastructure, electrical enclosures, and access panels. The fully threaded design with Class 3A thread fit ensures maximum engagement strength, reducing the risk of loosening under vibration—a common failure point in machinery and transportation equipment. These industrial fasteners deliver reliable performance where both security and durability are paramount requirements.

Specification Summary & Compliance

These security screws feature precision 8-32 UNC coarse threads with Class 3A fit tolerance for optimal engagement and reliability. Manufacturing complies with ASME B18.3 specifications ensuring dimensional accuracy and performance consistency. The products are fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, confirming environmental responsibility and workplace safety standards. The right-hand thread direction and standardized 82° countersink angle maintain compatibility with industry-standard installation practices and tooling.