S-90287A194 8-32 x 1/2" ASME B18.6.3 Tamper-Resistant One-Way-Drive Steel Round Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh industrial environments
• Excellent tensile strength rated at 60,000 psi ensures reliable performance under heavy loads and vibration
• Enhanced durability with Rockwell B70 hardness that maintains thread integrity and prevents stripping during installation
• Quick and secure fastening thanks to coarse UNC threads and Class 2A fit that provide smooth engagement and reduce assembly time
• Maximum holding power from fully threaded design that distributes stress evenly along the entire screw length
• Tamper-resistant security with one-way drive style that prevents unauthorized removal in public or high-security applications
• Broad compatibility with standard 8-32 UNC components, ensuring easy replacement and interchangeability

Professional Applications & Engineering Value

These zinc-plated steel rounded head screws with 8-32 UNC coarse threads are engineered to address common industrial fastening challenges, including vibration loosening and corrosion-induced failure. The fully threaded design ensures consistent clamping force across the entire shank, making them ideal for applications where joint integrity is critical, such as machinery assembly, electrical enclosures, and automotive components. The right-hand thread direction and Class 2A thread fit provide reliable engagement with standard nuts and tapped holes, reducing the risk of cross-threading during high-volume production. With their rounded head profile and tamper-resistant drive, these screws offer both aesthetic appeal and security in public infrastructure, transportation, and manufacturing equipment where durability and compliance are non-negotiable.

Specification Summary & Compliance

These screws feature precision UNC coarse threads with Class 2A thread fit for consistent dimensional accuracy and easy assembly. Manufactured in compliance with ASME B18.6.3 standards, they ensure reliable performance in industrial fastening applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.