S-96452A530 4-40 x 3/4" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws
Steel Button Head Torx Plus 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 corrosion resistance with Black-Oxide coating, extending service life in demanding industrial environments
- Enhanced torque transmission through Torx Plus IP8 drive, reducing cam-out risk and tool wear
- Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for high-stress applications
- Precision thread engagement with Class 3A fit ensuring reliable fastening in critical assemblies
- Optimized head design featuring rounded button profile for reduced surface protrusion and improved aesthetics
- Full threading capability providing consistent clamping force along the entire 3/4" length
- Regulatory compliance meeting RoHS 3 and REACH environmental standards for global supply chain integration
Professional Applications & Engineering Value
Engineered for precision assemblies requiring reliable fastening performance, these 4-40 UNC Class 3A screws with Black-Oxide Alloy Steel construction address critical industrial challenges. The Torx Plus IP8 drive system delivers superior torque transfer, eliminating stripping concerns in high-vibration environments common to automotive, aerospace, and heavy machinery applications. The coarse thread design ensures rapid installation while maintaining Class 3A thread fit precision for consistent clamping force. The rounded button head profile minimizes snagging hazards while providing a finished appearance in visible assemblies. With fully threaded construction and 120,000 psi tensile strength, these fasteners maintain structural integrity under dynamic loads and thermal cycling conditions.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with ASTM F835 compliance, these screws feature Class 3A thread tolerances for precision fit. The 4-40 UNC coarse thread with right-hand orientation ensures industry-standard compatibility. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming suitability for global industrial applications requiring hazardous substance restrictions.
