S-91870A835 10-32 x 1 1/4" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with T25 Torx drive design, preventing unauthorized access in high-security environments
• Superior corrosion protection through 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh conditions
• Precise thread engagement with Class 3A UNF fine threads, delivering secure fastening and vibration resistance
• Optimized flush mounting with standard 82° countersink angle and flat head design, creating smooth surface finishes
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, supporting heavy-duty applications
• Full-thread coverage along the 1-1/4" length, providing maximum grip and load distribution
• Regulatory compliance assurance meeting ASME B18.3 standards while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

Engineered for high-security applications where unauthorized tampering poses significant risks, these 10-32 flat head screws with tamper-resistant Torx drive provide reliable protection in public infrastructure, electronic enclosures, and industrial equipment. The 18-8 stainless steel material combined with passivated finish delivers exceptional resistance to corrosion, moisture, and chemical exposure, making them ideal for outdoor installations, marine environments, and manufacturing facilities. The Class 3A UNF fine threads ensure precise fitment and superior vibration resistance, while the standard 82° countersink angle allows for seamless flush mounting in various materials. These fully threaded security screws maintain structural integrity under stress with their 70,000 psi tensile strength, providing engineers with a dependable fastening solution that balances security requirements with mechanical performance.

Specification Summary & Compliance

These flat head screws feature precision 10-32 UNF threads with Class 3A thread fit for superior dimensional accuracy and engagement. Manufacturing complies with ASME B18.3 specifications for consistent quality and performance. The products are fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards. With right-hand thread direction, 0.411" head diameter, and 1-1/4" length, these components deliver reliable performance across industrial applications while maintaining regulatory compliance.