S-90484A185 6-32 x 3/4" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating protecting against rust and extending service life in demanding environments
• Enhanced tamper resistance through specialized hex drive design for improved security in public or restricted-access applications
• Exceptional load-bearing capacity with 130,000 psi tensile strength ensuring reliable performance under high-stress conditions
• Precision thread engagement with Class 3A fit providing superior vibration resistance and reduced loosening in dynamic applications
• Optimized installation efficiency through coarse UNC threading enabling faster assembly and reduced cross-threading risks
• Consistent mechanical performance with Rockwell C39 hardness maintaining structural integrity through repeated use cycles
• Low-profile rounded head design offering smooth surface finish while maintaining adequate drive engagement

Professional Applications & Engineering Value

These black-oxide alloy steel screws deliver critical performance advantages in industrial settings where corrosion resistance and tamper-proof security are paramount. The 6-32 UNC coarse threading combined with Class 3A thread fit ensures rapid installation while maintaining vibration resistance in machinery, electrical enclosures, and automotive assemblies. The rounded button head profile provides a finished appearance while the tamper-resistant hex drive prevents unauthorized access in public infrastructure, transportation, and security equipment. With 130,000 psi tensile strength and Rockwell C39 hardness, these fasteners withstand extreme mechanical stresses in heavy-duty applications, reducing maintenance frequency and replacement costs.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with 6-32 UNC coarse thread specifications. Fully compliant with ASME B18.3 dimensional standards and ASTM F835 material specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. Features right-hand thread direction and fully threaded shank for maximum engagement strength.