S-91900A249 10-24 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
- Superior tamper resistance with T25 Torx drive for enhanced security in public or restricted access applications
- Excellent corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh environments
- High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term performance
- Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
- Full threading along the 1-1/4" length provides maximum grip and adjustability in various material thicknesses
- Rounded button head design offers a low-profile, finished appearance while reducing snagging risks
- Compliance with industry standards including ASME B18.3 for consistent quality and dimensional accuracy
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw with tamper-resistant Torx drive is engineered to address critical needs in industrial and security-focused environments. The passivated finish enhances the natural corrosion resistance of stainless steel, making it suitable for outdoor equipment, marine applications, and chemical processing facilities where moisture and corrosive agents are present. The Class 3A thread fit and UNC coarse threading provide superior holding power and reduce the risk of cross-threading during installation, which is essential for maintenance efficiency. Its 70,000 psi tensile strength ensures it can withstand high stress in machinery, electronic enclosures, and public infrastructure, while the tamper-resistant feature deters unauthorized access—a key consideration for utility boxes, transportation systems, and secured panels.
Specification Summary & Compliance
This fastener features a 10-24 UNC thread size with Class 3A thread fit for precise dimensional accuracy, and is fully threaded along its 1-1/4" length. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and performance. The screw is also RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for use in various markets.
