S-91870A764 3/8"-16 x 2 1/4" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx T45 drive requiring matching tools, preventing unauthorized access in high-security environments
• Superior corrosion resistance through 18-8 stainless steel construction and passivated surface treatment for extended service life in harsh conditions
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty industrial applications
• Precision thread engagement with Class 3A fit and UNC coarse threading ensuring reliable fastening and vibration resistance
• Optimal flush installation featuring 82° countersink angle and standard flat head profile for seamless surface finishing
• Full-thread coverage across the entire 2-1/4" length providing maximum grip strength and load distribution
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws with tamper-resistant Torx T45 drive address critical security and reliability challenges in industrial settings. The 18-8 stainless steel construction 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 Class 3A thread fit ensures precise engagement with mating components, reducing the risk of loosening under vibration while maintaining structural integrity. The 82° countersink angle allows for flush mounting in machinery, security panels, and public infrastructure where both aesthetic finish and tamper-proof characteristics are essential. These fully threaded screws deliver uniform stress distribution across the entire fastener length, preventing point failures in high-stress applications.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 3A thread fit for precision engagement and UNC coarse threading (3/8"-16) for rapid installation. Compliant with ASME B18.3 specifications for dimensional accuracy and performance requirements. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. Features include 0.375" thread diameter, 2-1/4" length, and standardized 82° countersink angle for consistent installation across industrial applications.