S-98164A917 5/8"-11 x 3" 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
• Precise, reliable fastening ensured by Class 3A thread fit and fully threaded 5/8"-11 UNC coarse thread design
• Easy installation and removal with 3/8" hex drive and rounded button head for streamlined assembly processes
• Long-term durability in industrial settings with full compliance to ASME B18.3 manufacturing standards
• Environmental and safety compliance meeting RoHS 3 and REACH regulations for global industrial use
• Versatile 3" length providing ample engagement for secure connections in various material thicknesses

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 surface protection against chemical exposure and oxidation, making them ideal for marine, chemical processing, and food industry applications. The 5/8"-11 UNC coarse thread with Class 3A fit ensures superior thread engagement and vibration resistance in heavy machinery, structural assemblies, and equipment manufacturing. The combination of hex drive and rounded button head profile allows for efficient installation in confined spaces while maintaining a clean, finished appearance. These fully threaded screws provide consistent clamping force across the entire 3" length, solving common challenges of loosening under dynamic loads and ensuring long-term joint integrity in critical fastening applications.

Specification Summary & Compliance

This rounded head screw features precision 5/8"-11 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and engagement. Manufacturing complies with ASME B18.3 standards ensuring consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial components. The 316 stainless steel material with passivated finish provides enhanced corrosion protection while maintaining the specified mechanical properties of 70,000 psi tensile strength and Rockwell B55 hardness.