S-91900A260 10-32 x 1/4" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior tamper resistance with T25 Torx drive design, preventing unauthorized access in high-security environments
• Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable fastening in critical applications
• Enhanced mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty use
• Optimized head design featuring rounded button profile for reduced snagging and improved aesthetic integration
• Full threading capability providing maximum grip length and uniform stress distribution
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations

Professional Applications & Engineering Value

These 10-32 UNF Class 3A rounded head screws deliver critical security and reliability in demanding industrial settings. The 18-8 stainless steel material combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for outdoor equipment, marine applications, and harsh manufacturing environments. The tamper-resistant Torx drive (T25 size) ensures that fastened components remain secure against unauthorized tampering in public infrastructure, electrical enclosures, and security systems. The fine UNF threads with Class 3A precision enable superior vibration resistance and consistent clamping force in machinery, automotive assemblies, and precision instruments where rounded head design minimizes protrusion risks while maintaining structural integrity.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerance for superior engagement. Features 10-32 UNF fine threads with right-hand direction and full threading along the 1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Mechanical properties include Rockwell B70 hardness and 70,000 psi tensile strength for reliable performance in critical fastening applications.