S-98164A444 6-32 x 1 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction with passivated finish
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring reliable fastening performance
• Easy installation and removal with 5/64" hex drive design providing secure tool engagement
• Full threading capability offering maximum grip length and versatile positioning options
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS 3, REACH)
• Rounded button head design providing a low-profile, finished appearance while reducing surface snagging

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel rounded head screws deliver exceptional performance where corrosion resistance and mechanical reliability are critical. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making these fully threaded screws ideal for chemical processing, marine applications, and food processing equipment where exposure to moisture and corrosive agents is common. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of cross-threading while maintaining consistent clamping force. The combination of 70,000 psi tensile strength and coarse UNC threading provides superior vibration resistance in machinery and equipment assemblies, while the hex drive design allows for high-torque installation without stripping. These industrial-grade fasteners solve critical challenges in maintenance-intensive applications where durability and long-term performance are paramount.

Specification Summary & Compliance

This 6-32 UNC threaded screw features precision Class 3A thread fit with coarse thread spacing, manufactured to exact dimensional standards. The fastener complies with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in industrial applications. The 1-1/4" length and fully threaded design provide consistent performance across the entire fastener length, while the 0.262" head diameter and standard rounded head profile maintain proper bearing surface for secure fastening applications.