S-90484A269 12-24 x 1/2" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws
Tamper-Resistant Hex-Drive 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 specialized hex drive design prevents unauthorized access in secure environments
- Exceptional strength and durability with 130,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Reliable corrosion protection through black-oxide coating on alloy steel for extended service life
- Precise thread engagement with Class 3A fit ensures secure fastening and vibration resistance
- Optimized installation efficiency with coarse UNC threading for faster assembly in industrial settings
- Low-profile rounded head design provides smooth finish while maintaining structural integrity
- Broad regulatory compliance meets critical industry standards for global manufacturing requirements
Professional Applications & Engineering Value
These 12-24 UNC thread screws with black-oxide alloy steel construction address critical engineering challenges in industrial fastening. The tamper-resistant hex drive provides essential security for public infrastructure, electrical enclosures, and machinery where unauthorized access poses safety risks. The Class 3A thread fit ensures precise tolerance control, eliminating loosening in high-vibration environments like manufacturing equipment and automotive assemblies. With coarse thread spacing and full threading, installation time is significantly reduced while maintaining the 130,000 psi tensile strength required for structural applications. The rounded head profile offers a finished appearance while preventing snagging in confined spaces, making these screws ideal for both functional and aesthetic applications across multiple industries.
Specification Summary & Compliance
These screws feature precision 12-24 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufacturing complies with ASME B18.3 specifications where identified as ASTM F835, ensuring consistent quality and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, making them suitable for global industrial applications with strict regulatory requirements.
