S-91900A925 3/8"-16 x 2 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with T45 Torx drive prevents unauthorized access in high-security industrial environments
• Superior corrosion protection through passivated 18-8 stainless steel construction ensures long-term reliability in harsh conditions
• Maximum torque transmission with Class 3A thread fit provides secure fastening and vibration resistance
• Full-thread engagement along the 2½" length delivers consistent clamping force across entire fastened area
• High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness withstands heavy-duty mechanical stress
• Standardized compatibility with UNC coarse thread spacing ensures easy installation and replacement in existing systems
• Regulatory compliance with ASME B18.3, RoHS 3, and REACH standards guarantees quality and environmental safety

Professional Applications & Engineering Value

These tamper-resistant Torx screws provide critical security solutions for industrial equipment, public infrastructure, and machinery where unauthorized access poses safety risks. The 18-8 stainless steel construction with passivated finish delivers exceptional corrosion resistance in demanding environments including outdoor installations, chemical processing facilities, and marine applications. The 3/8"-16 UNC coarse threading combined with Class 3A thread fit ensures rapid installation and reliable performance in high-vibration settings. The T45 drive system offers superior torque transmission compared to standard security fasteners, preventing tool slippage and damage during installation. These rounded head screws are engineered to maintain integrity under continuous mechanical stress while providing the security features necessary for critical infrastructure protection.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit for superior engagement and UNC coarse thread spacing for optimal performance in industrial applications. These fasteners comply with ASME B18.3 specifications for dimensional accuracy and mechanical properties. The screws feature full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures mechanical reliability across demanding industrial applications while maintaining corrosion resistance through the passivated finish on 18-8 stainless steel.