S-91900A542 1/4"-20 x 1" 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
- Tamper-resistant Torx T27 drive prevents unauthorized access, ideal for public or high-security installations.
- 18-8 stainless steel construction provides excellent corrosion resistance, ensuring long-term reliability in harsh environments.
- Passivated finish enhances the natural corrosion resistance of stainless steel for maximum durability.
- Class 3A thread fit offers superior precision and a tighter, more secure connection compared to standard fits.
- High tensile strength of 70,000 psi and Rockwell B70 hardness deliver robust performance under significant mechanical stress.
- Rounded button head profile presents a low-profile, finished appearance while reducing the risk of snagging.
- Full compliance with ASME B18.3, RoHS 3, and REACH guarantees product quality, safety, and environmental responsibility.
Professional Applications & Engineering Value
This 1/4-20 UNC Rounded Head Tamper-Resistant Torx Screw is engineered to solve critical challenges in industrial assembly and public infrastructure. The combination of 18-8 Stainless Steel and a passivated finish provides exceptional defense against rust and chemical exposure, making it perfect for outdoor equipment, marine applications, and food processing machinery where corrosion is a constant threat. The tamper-resistant Torx T27 drive is a key security feature, deterring vandalism and unauthorized disassembly in public fixtures, electronic enclosures, and transportation systems. Its Class 3A thread fit ensures a precise, vibration-resistant connection, crucial for maintaining the integrity of assemblies in high-stress environments. This screw delivers reliable, long-lasting performance where security and durability are non-negotiable.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with a Class 3A fit for high precision. It is manufactured from 18-8 Stainless Steel with a passivated surface treatment. The product is fully threaded and meets the dimensional and mechanical specifications of ASME B18.3. It is also verified to be compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.
