S-98164A914 5/8"-11 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 due to 316 stainless steel construction and passivated finish
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Precise Class 3A thread fit provides secure fastening with minimal risk of cross-threading in industrial assemblies
• 3/8" hex drive design allows for high-torque installation with standard tools, reducing assembly time
• Full UNC coarse threading enables faster installation and superior holding power in various materials
• Rockwell B55 hardness rating maintains thread integrity and resistance to wear during repeated use
• Compliance with ASME B18.3, RoHS 3, and REACH ensures meeting strict industrial and environmental standards

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw delivers exceptional value in demanding applications where corrosion resistance and mechanical strength are critical. The combination of UNC coarse threading and Class 3A thread fit ensures reliable performance in metal fabrication, marine equipment, and chemical processing installations. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making it ideal for environments exposed to moisture, chemicals, and salt spray. The hex drive configuration provides superior torque transmission during installation, while the fully threaded design offers consistent clamping force along the entire fastener length. These features make it particularly valuable in structural applications, machinery assembly, and infrastructure projects where long-term reliability is essential.

Specification Summary & Compliance

This 5/8"-11 UNC screw features Class 3A thread fit precision and coarse threading for optimal performance in industrial applications. Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and interchangeability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. With Rockwell B55 hardness and 70,000 psi tensile strength, it meets rigorous mechanical requirements for heavy-duty applications while maintaining corrosion resistance through its 316 stainless steel composition and passivated surface treatment.