S-91870A727 12-24 x 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced Security - Tamper-resistant Torx T20 drive prevents unauthorized removal, making these screws ideal for high-security applications.
• Superior Corrosion Resistance - Made from 18-8 Stainless Steel with a passivated finish for excellent durability in harsh environments.
• High Tensile Strength - 70,000 psi tensile strength and Rockwell B70 hardness ensure reliable performance under heavy loads.
• Optimized Head Design - Undercut flat head with 82° countersink angle allows for flush mounting and reduced risk of stripping.
• Full Thread Engagement - Fully threaded design provides maximum holding power and vibration resistance in assemblies.
• Precision Thread Fit - Class 2A UNC coarse threads ensure easy installation and consistent performance in various materials.
• Regulatory Compliance - Meets ASME B18.3 standards and is RoHS 3 and REACH compliant for safe, industrial use.

Professional Applications & Engineering Value

These 12-24 UNC flat head screws with tamper-resistant Torx T20 drive are engineered to address critical security and durability challenges in industrial settings. The 18-8 Stainless Steel construction, enhanced by a passivated finish, provides exceptional resistance to corrosion, making them suitable for outdoor, marine, or chemical-exposed environments. The undercut flat head profile and 82° countersink angle ensure a secure, flush fit, reducing protrusion risks and improving aesthetic integration. With coarse threads and Class 2A fit, these screws offer reliable fastening in metal, plastic, and wood assemblies, while the high tensile strength and full threading prevent loosening under vibration. Ideal for industrial security applications such as machinery guards, electronic enclosures, and public infrastructure, they deliver long-term performance and compliance with rigorous standards.

Specification Summary & Compliance

This screw features a 12-24 UNC coarse thread with Class 2A tolerance for precise fit and easy installation. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The right-hand thread direction and fully threaded design support consistent performance across various applications.