S-91900A544 1/4"-20 x 1 1/4" 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 tamper resistance with T27 Torx drive to prevent unauthorized access and ensure equipment security.
- Superior corrosion resistance from 18-8 stainless steel and passivated finish, ideal for harsh or outdoor environments.
- High mechanical strength with 70,000 psi tensile and Rockwell B70 hardness for reliable, long-lasting performance under stress.
- Precise thread engagement due to Class 3A fit and UNC coarse thread, ensuring secure fastening and vibration resistance.
- Broad compliance with ASME B18.3, RoHS 3, and REACH, meeting strict industry and environmental standards.
- Low-profile rounded button head provides a smooth finish, reducing snagging and improving safety in assembled products.
- Full threading along the 1-1/4" length offers maximum grip and adjustability in various material thicknesses.
Professional Applications & Engineering Value
This tamper-resistant Torx screw is engineered to address critical security and durability challenges in industrial settings. Made from 18-8 stainless steel with a passivated finish, it resists rust and chemical exposure, making it suitable for outdoor equipment, marine hardware, and food processing machinery. The T27 tamper-resistant drive deters vandalism and unauthorized disassembly, while the rounded button head minimizes protrusion for safer, cleaner installations. With a Class 3A thread fit and UNC coarse threads, it ensures tight, reliable connections that withstand vibrations and heavy loads, reducing maintenance needs and downtime in security-focused applications like access panels, enclosures, and public infrastructure.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision and strength. It is manufactured in compliance with ASME B18.3 standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
