S-96075A107 4-40 x 3/4" ASME B18.3 Tamper-Resistant Torx Steel Button Head Screws
Tamper-Resistant Torx 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 T8 Torx drive design, preventing unauthorized access in security-sensitive environments.
- Superior corrosion protection from the black-oxide coating, extending service life in harsh industrial conditions.
- High tensile strength of 130,000 psi ensures reliable performance under heavy loads and vibrations.
- Precise Class 3A thread fit guarantees secure fastening and reduces the risk of cross-threading during installation.
- Rockwell C38 hardness provides excellent wear resistance and durability for long-term use.
- Fully threaded 4-40 UNC coarse thread allows for quick assembly and strong holding power in various materials.
- Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 4-40 UNC black-oxide alloy steel rounded head screw is engineered to address critical challenges in industrial and security applications. The tamper-resistant Torx T8 drive minimizes the risk of tampering, making it ideal for public infrastructure, electronic enclosures, and machinery requiring restricted access. The black-oxide surface treatment offers robust corrosion resistance, reducing maintenance needs in humid or chemically aggressive environments. Combined with a coarse thread and Class 3A fit, it ensures rapid, reliable installation with high clamping force, while the rounded head design distributes pressure evenly to prevent surface damage. These features make it a dependable choice for OEMs and maintenance teams seeking secure, long-lasting fastening solutions.
Specification Summary & Compliance
This screw features a 4-40 UNC thread size with Class 3A thread fit for precise dimensional accuracy, and it is fully threaded for consistent performance. It meets ASME B18.3 manufacturing specifications, ensuring reliability in mechanical assemblies. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and health safety standards for industrial use.
