S-90484A571 3/8"-16 x 1" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized hex drive design prevents unauthorized access in security-sensitive applications
• Superior corrosion protection through black-oxide coating extends service life in demanding industrial environments
• Exceptional mechanical strength with 130,000 psi tensile strength and Rockwell C39 hardness withstands high-stress applications
• Precise thread engagement with Class 3A fit ensures reliable, vibration-resistant connections in critical assemblies
• Optimized installation efficiency through UNC coarse threading reduces assembly time while maintaining secure fastening
• Versatile rounded button head profile provides smooth surface finish while accommodating standard tool access
• Full regulatory compliance meets industry standards for quality, safety, and environmental requirements

Professional Applications & Engineering Value

Engineered for industrial security applications where tamper resistance and reliability are paramount, these black-oxide alloy steel screws deliver exceptional performance in machinery, access panels, and permanent installations. The tamper-resistant hex drive system prevents unauthorized disassembly while maintaining standard tool compatibility for authorized maintenance. With Class 3A thread fit and UNC coarse threading, these fasteners provide superior vibration resistance and quick installation in high-volume production environments. The combination of 130,000 psi tensile strength and Rockwell C39 hardness ensures these screws maintain integrity under extreme mechanical stress, making them ideal for heavy equipment, structural frameworks, and security enclosures where failure is not an option.

Specification Summary & Compliance

These rounded head screws feature precision 3/8"-16 UNC Class 3A threads with coarse spacing for optimal engagement. Manufacturing specifications comply with ASME B18.3 and ASTM F835 standards, ensuring dimensional accuracy and performance consistency. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to international substance restriction requirements. The fully threaded design and 1" length provide maximum fastening versatility across various material thicknesses.