S-90484A245 10-24 x 3/4" 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
- Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress industrial applications
- Tamper-resistant hex drive provides enhanced security against unauthorized access in public or sensitive installations
- Black-oxide coating on alloy steel offers superior corrosion resistance for extended service life in demanding environments
- Precision Class 3A thread fit guarantees consistent, vibration-resistant fastening with minimal assembly variation
- Fully threaded design allows maximum grip length and adjustment flexibility across various material thicknesses
- Rockwell C39 hardness maintains thread integrity and drive engagement through repeated installation cycles
- Comprehensive regulatory compliance including RoHS 3 and REACH ensures environmental responsibility and global market acceptance
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head screws deliver critical engineering advantages where vibration resistance, security, and corrosion protection are paramount. The 10-24 UNC coarse thread configuration provides rapid installation in sheet metal, machinery, and structural assemblies while maintaining Class 3A fit precision for consistent clamp load distribution. The tamper-resistant hex drive addresses security concerns in public infrastructure, electrical enclosures, and transportation equipment without compromising the high 130,000 psi tensile strength needed for heavy-duty fastening applications. The combination of fully threaded design and Rockwell C39 hardness ensures reliable performance in high-vibration environments where fastener integrity is critical to operational safety.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 and ASTM F835 specifications with Class 3A thread fit tolerances for precision engagement. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features UNC coarse threading with right-hand direction, 0.19" thread diameter, and 5/32" tamper-resistant hex drive configuration. The black-oxide surface treatment on alloy steel substrate provides consistent corrosion protection while maintaining the specified mechanical properties.
