S-95635A554 1/4"-20 x 3" ASME B18.3 Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws
Tamper-Resistant Hex-Drive 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
- Superior tamper resistance with specialized hex drive design to prevent unauthorized access in secure environments
- Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
- High-load bearing capability with 70,000 psi tensile strength for demanding industrial applications
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening performance
- Enhanced durability with Rockwell B70 hardness maintaining structural integrity under stress
- Full-threaded design providing maximum grip length and holding power across the entire 3" shaft
- Regulatory compliance meeting ASME B18.3 standards and environmental regulations for global industrial use
Professional Applications & Engineering Value
Engineered for high-security industrial applications, these tamper-resistant hex screws provide critical protection against unauthorized access in public facilities, machinery enclosures, and electronic cabinets. The 18-8 stainless steel construction combined with passivated finish delivers exceptional resistance to corrosion, moisture, and chemical exposure, ensuring long-term reliability in harsh environments. The UNC coarse thread with Class 3A fit enables quick installation and superior vibration resistance, while the rounded button head profile offers a clean, finished appearance without sharp edges. These security screws are specifically designed to meet the demanding requirements of industrial maintenance, manufacturing equipment, and infrastructure projects where both security and durability are paramount.
Specification Summary & Compliance
This fastener features precise Class 3A thread fit with UNC coarse threading (1/4"-20) and maintains dimensional accuracy per ASME B18.3 specifications. The screw is manufactured from 18-8 stainless steel with passivated finish and meets comprehensive regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance. With full threading along the 3" length and tamper-resistant 5/32" hex drive, this security screw delivers reliable performance for industrial fastening applications requiring both strength and regulatory adherence.
