S-98164A280 5/16"-18 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, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high-stress conditions
• Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance in critical assemblies
• Easy installation and removal with hex drive design providing superior torque transmission and reduced tool slippage
• Full thread coverage along the 2" length for maximum grip and load distribution across the entire fastener
• Regulatory compliance with ASME B18.3 standards and environmental directives including RoHS 3 and REACH
• Versatile coarse threading (UNC) for quicker installation and better performance in softer materials or debris-prone applications

Professional Applications & Engineering Value

These 316 stainless steel rounded head screws deliver exceptional performance in demanding industrial environments where corrosion resistance and mechanical reliability are paramount. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, 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 Class 3A thread fit provides tighter tolerances than standard fasteners, ensuring secure connections in vibration-prone machinery and precision equipment. With 70,000 psi tensile strength and full threading along the 2" length, these button head screws distribute clamping force evenly while maintaining structural integrity in high-stress assemblies, from industrial machinery to structural frameworks requiring UNC coarse thread advantages for faster installation and superior performance in various materials.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit standards with UNC coarse threading (5/16"-18) and right-hand thread direction. Complies with ASME B18.3 manufacturing specifications for dimensional accuracy and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for restricted substances. Features include 2" fully threaded length, 0.547" head diameter, and 3/16" hex drive size for standardized tool compatibility.