S-92949A829 10-32 x 2 1/4" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, vibration-resistant connections
• High mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Easy installation and removal with hex drive design providing secure tool engagement and reduced stripping risk
• Optimized load distribution through rounded button head design that minimizes surface damage and stress concentration
• Full thread coverage along the 2-1/4" length for maximum grip strength and uniform clamping force
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 10-32 UNF Class 3A Rounded Head Screw delivers exceptional engineering value in precision assembly applications where corrosion resistance and thread reliability are critical. The combination of 18-8 stainless steel material and passivated finish provides superior protection against chemical exposure and atmospheric corrosion, making it ideal for marine, chemical processing, and food equipment applications. The Class 3A thread fit with UNF fine threading ensures tight tolerances for vibration-prone environments, while the hex drive style allows for high-torque installation without cam-out. The rounded button head profile offers a low-profile solution that reduces snagging hazards and provides a finished appearance in visible assemblies. These features collectively address common industrial challenges of fastener failure, maintenance costs, and assembly efficiency.

Specification Summary & Compliance

This fastener maintains precise Class 3A thread fit tolerances according to UNF standards, ensuring consistent performance in critical applications. Manufacturing complies with ASME B18.3 specifications (ASTM F879) for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, confirming environmental responsibility and material safety. With a right-hand thread direction and fully threaded design across the 2-1/4" length, this screw delivers reliable performance in industrial fastening systems requiring high strength and corrosion resistance.