S-91870A631 1/4"-20 x 1 1/2" 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 specialized T30 Torx drive for secure installations in high-security environments
- Superior corrosion protection through passivated 18-8 stainless steel construction for long-term reliability in harsh conditions
- Maximum load-bearing capacity with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Precise thread engagement with Class 3A UNC coarse threads ensuring vibration-resistant fastening
- Flush mounting capability with standard 82° countersink angle for smooth surface finishes
- Full-threaded design providing consistent holding power along the entire 1-1/2" length
- Regulatory compliance meeting ASME B18.3 standards and environmental regulations for industrial safety
Professional Applications & Engineering Value
Engineered for high-security industrial applications, this 18-8 stainless steel flat head screw addresses critical challenges in access control and vandal-prone environments. The tamper-resistant T30 Torx drive prevents unauthorized removal while the passivated finish delivers exceptional corrosion resistance against chemicals, moisture, and environmental exposure. With Class 3A UNC coarse threads, the fastener maintains secure connections in high-vibration settings, making it ideal for industrial machinery, security panels, and outdoor equipment. The fully threaded 1-1/2" length ensures maximum engagement depth, while the 82° flat head profile creates seamless surface integration for both functional and aesthetic requirements.
Specification Summary & Compliance
This 1/4"-20 flat head screw features precision UNC coarse threads with Class 3A fit for superior dimensional accuracy. Manufacturing complies with ASME B18.3 specifications for consistent quality and performance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe use across industrial sectors. The right-hand thread direction and standard flat head profile maintain compatibility with conventional installation tools and procedures.
