S-92949A891 1-64 x 3/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Superior load-bearing capacity thanks to 70,000 psi tensile strength and Rockwell B55 hardness, preventing stripping and deformation under stress
• Precise, secure fastening with Class 3A thread fit and UNC coarse threading, reducing cross-threading risks and enabling quick installation
• Enhanced torque transmission through the 0.050" hex drive, minimizing tool slippage and improving assembly efficiency
• Full-thread engagement along the 3/4" length, providing consistent clamping force across the entire fastened joint
• Broad regulatory compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility
• Smooth, low-profile rounded head design that reduces surface damage and offers a finished appearance in visible applications

Professional Applications & Engineering Value

This 1-64 UNC threaded rounded head screw delivers critical performance in demanding industrial settings where vibration resistance and material integrity are paramount. The 18-8 stainless steel base, combined with a passivated finish, effectively counters oxidation and chemical exposure in machinery, electrical enclosures, and outdoor equipment. Its coarse thread design and Class 3A fit ensure rapid, precise assembly—minimizing production downtime while maintaining joint security. The hex drive offers reliable torque application, preventing fastener failure in high-stress applications such as automotive assemblies, conveyor systems, and heavy-duty fabrication. Engineered to meet ASME B18.3, it provides a standardized, dependable solution for OEMs and maintenance teams seeking durable, compliant industrial fasteners.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit and UNC coarse thread standards for precise dimensional accuracy. Manufacturing follows ASME B18.3 specifications, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The fully threaded 3/4" length and right-hand threading ensure consistent performance across industrial applications.