S-91870A838 10-32 x 1 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Tamper-resistant T25 Torx drive prevents unauthorized access, enhancing security in public or sensitive equipment
• 18-8 Stainless Steel construction with passivated finish delivers excellent corrosion resistance for long-lasting performance in harsh environments
• High tensile strength of 70,000 psi and Rockwell B70 hardness ensures reliable, vibration-resistant fastening under heavy loads
• Class 3A thread fit with 10-32 UNF fine threads provides superior engagement and precise, leak-resistant connections
• 82° countersink angle and flat head design allows for a flush, low-profile installation, reducing snagging risks
• Fully threaded shank offers maximum grip and adjustment flexibility along the entire length
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees consistent quality and environmental safety for industrial use

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered to address critical challenges in industrial and security-focused applications. The tamper-resistant Torx drive (T25 size) deters vandalism and unauthorized disassembly, making them ideal for public infrastructure, electronic enclosures, and machinery requiring controlled access. Made from 18-8 Stainless Steel and featuring a passivated finish, they resist corrosion from moisture, chemicals, and outdoor exposure, extending service life in demanding conditions. The fine UNF threads with Class 3A fit ensure tight, precise fastening, minimizing the risk of loosening under vibration—common in automotive, aerospace, and manufacturing assemblies. Their fully threaded design and 82° countersink facilitate seamless integration into metal, plastic, or composite materials, providing engineers with a dependable, high-security fastening solution that meets rigorous industry standards.

Specification Summary & Compliance

This product adheres to precise dimensional and performance criteria, including a Class 3A thread fit for high-accuracy engagement and UNF (Unified National Fine) thread standards. Manufacturing follows ASME B18.3 specifications, ensuring consistency and reliability. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free of hazardous substances and suitable for global industrial and commercial use.