S-96075A102 4-40 x 1/4" 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
- Superior tamper resistance with T8 Torx drive design to prevent unauthorized access in secure environments
- Exceptional durability from Black-Oxide Alloy Steel construction providing reliable corrosion resistance
- Precise thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
- High tensile strength rated at 130,000 psi for demanding industrial applications
- Optimized head design with rounded button profile for reduced snagging and clean installation
- Enhanced hardness at Rockwell C38 maintaining structural integrity under stress
- Full threading along the 1/4" length for maximum grip and load distribution
Professional Applications & Engineering Value
These 4-40 UNC Class 3A Black-Oxide Alloy Steel Rounded Head Screws deliver critical performance in industrial settings where security and reliability are paramount. The tamper-resistant T8 Torx drive prevents unauthorized disassembly in public infrastructure, electronic enclosures, and machinery guards. The coarse thread spacing and Class 3A thread fit ensure rapid installation with minimal cross-threading risk, while the Black-Oxide surface treatment provides essential corrosion protection in demanding environments. Engineered for right-hand thread applications, these fully threaded fasteners maintain consistent clamping force in vibration-prone assemblies, making them ideal for manufacturing equipment, telecommunications hardware, and automotive components where long-term fastener integrity is non-negotiable.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with precision Class 3A thread fit tolerances for superior engagement. Features 4-40 UNC coarse threads with right-hand direction and fully threaded 1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The combination of 130,000 psi tensile strength and Rockwell C38 hardness verifies mechanical performance exceeds industry requirements for critical fastening applications.
