S-91900A536 1/4"-20 x 3/8" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws
Tamper-Resistant Torx Stainless Steel Button 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 security protection with tamper-resistant Torx T27 drive that prevents unauthorized removal in sensitive applications
- Superior corrosion resistance through 18-8 stainless steel construction and passivated surface treatment for long-term reliability
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding industrial environments
- Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
- Streamlined installation featuring a rounded button head design that reduces snagging and provides a finished appearance
- Full-threaded coverage along the entire 3/8" length for maximum grip and load distribution
- Regulatory compliance meeting ASME B18.3 standards while being RoHS 3 and REACH compliant for global applications
Professional Applications & Engineering Value
These tamper-resistant Torx rounded head screws provide critical security solutions for industrial equipment, public infrastructure, and electronic enclosures where unauthorized access must be prevented. The 18-8 stainless steel material with passivated finish offers exceptional resistance to corrosion, moisture, and chemical exposure, ensuring long-term performance in harsh environments. The T27 drive system combines installation efficiency with anti-tamper protection, while the Class 3A thread fit and UNC coarse threading deliver reliable fastening in vibration-prone applications. The rounded button head profile eliminates sharp edges, making these security screws ideal for applications requiring both safety and aesthetic considerations.
Specification Summary & Compliance
This security fastener features precision 1/4"-20 UNC coarse threads with Class 3A fit for superior thread engagement and meets ASME B18.3 dimensional specifications. The manufacturing process ensures compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making these screws suitable for global industrial applications requiring strict material compliance standards.
