S-91870A340 3/8"-16 x 1 1/4" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws
Tamper-Resistant Torx Stainless Steel Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced tamper resistance with T45 Torx drive prevents unauthorized access in high-security applications
- Superior corrosion protection through 18-8 stainless steel construction and passivated surface treatment
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
- Reliable thread engagement with Class 2A UNC coarse threads ensuring secure fastening in various materials
- Optimized flush mounting with standard 82° countersink angle and flat head design for smooth surface finishing
- Full regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
- Complete threading coverage along the 1-1/4" length provides maximum grip and load distribution
Professional Applications & Engineering Value
This 3/8"-16 UNC flat head tamper-resistant Torx screw delivers critical security and performance advantages in demanding industrial environments. The 18-8 stainless steel composition combined with passivated finish creates a robust barrier against corrosion, making it ideal for outdoor equipment, marine applications, and chemical processing facilities where environmental exposure is a concern. The T45 tamper-resistant drive system specifically addresses security challenges in public infrastructure, transportation, and access control systems where vandalism or unauthorized tampering presents operational risks. The Class 2A thread fit and coarse UNC threading ensure rapid installation and reliable performance in both metallic and composite materials, reducing assembly time while maintaining high tensile strength requirements for structural applications.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread profile (3/8"-16). Fully compliant with ASME B18.3 mechanical specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical regulations. Features standard 82° countersink angle and right-hand threading orientation for consistent performance across industrial applications.
