S-98164A915 5/8"-11 x 2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Precise thread engagement with Class 3A UNC coarse threading ensuring reliable fastening and vibration resistance
• Efficient installation with 3/8" hex drive providing maximum torque transmission and reduced tool slippage
• Full-length threading offering consistent holding power along the entire 2" length for versatile mounting applications
• Rounded button head design creating a finished appearance while minimizing surface protrusion
• Regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel rounded head screws deliver exceptional performance where corrosion resistance is critical. The passivated finish enhances the natural corrosion-fighting properties of 316 stainless, making these hex drive screws ideal for chemical processing, marine applications, and food processing equipment where exposure to moisture and aggressive substances is common. The 5/8"-11 UNC coarse threading with Class 3A fit ensures rapid installation and secure fastening in various materials, while the 3/8" hex drive accommodates high torque applications without stripping. These fully threaded screws provide uniform clamping force across the entire 2" length, making them suitable for structural assemblies, machinery mounting, and heavy equipment where vibration resistance and long-term reliability are essential.

Specification Summary & Compliance

This rounded head screw features precision 5/8"-11 UNC coarse threading with Class 3A thread fit for superior engagement and dimensional accuracy. Manufactured in compliance with ASME B18.3 specifications, the fastener meets rigorous industrial standards for quality and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring responsible material usage and environmental safety. The combination of 70,000 psi tensile strength and Rockwell B55 hardness provides reliable mechanical performance across demanding applications.