S-98164A450 8-32 x 5/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 316 stainless steel construction and passivated finish, ideal for harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance
• Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threads, reducing the risk of cross-threading
• Easy installation and removal with 3/32" hex drive, providing a positive grip and minimizing tool slippage
• Versatile fully-threaded design for maximum grip and holding power across the entire 5/8" length
• Rounded button head profile offers a low-profile, finished appearance while reducing surface snagging
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH for assured quality and safety

Professional Applications & Engineering Value

This 8-32 UNC 5/8" 316 Stainless Steel Rounded Head Screw is engineered to solve critical challenges in demanding industrial settings. Its 316 stainless steel material and passivated finish provide outstanding resistance to corrosion, making it ideal for applications in chemical processing, marine environments, and food equipment where exposure to moisture and aggressive substances is common. The Class 3A thread fit and coarse UNC threading ensure quick assembly and high vibration resistance, reducing installation time and maintenance needs. The combination of 70,000 psi tensile strength and a rounded button head with hex drive allows for reliable fastening in tight spaces, offering both structural integrity and a clean aesthetic finish. This screw delivers consistent performance in machinery, enclosures, and structural assemblies where durability and regulatory compliance are paramount.

Specification Summary & Compliance

This screw features precise Class 3A thread fit per UNC standards, ensuring tight tolerances and reliable engagement. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated and international markets. The product meets all specified dimensional and material requirements, including a 5/8" length, fully threaded design, and right-hand thread direction, providing assurance of quality and performance consistency.