S-98164A440 6-32 x 3/16" 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 reliable performance under heavy loads
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized drive efficiency with 5/64" hex drive providing superior torque transmission and reduced cam-out risk
• Streamlined installation with fully threaded design and rounded button head profile for smooth assembly and flush mounting
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
• Versatile application compatibility with standard 6-32 thread size suitable for various industrial assembly requirements

Professional Applications & Engineering Value

These 316 stainless steel rounded head screws deliver critical performance advantages in demanding industrial environments where corrosion resistance and mechanical reliability are paramount. The combination of passivated finish and 316 stainless steel material provides exceptional protection against chemical exposure, saltwater conditions, and industrial atmospheres, significantly reducing maintenance frequency and replacement costs. The Class 3A thread fit with UNC coarse threading ensures rapid assembly and superior vibration resistance, while the fully threaded design maximizes engagement depth in various material thicknesses. The rounded button head profile with hex drive offers both aesthetic appeal and practical installation benefits, making these fasteners ideal for machinery, marine equipment, chemical processing systems, and food-grade applications where both performance and appearance matter.

Specification Summary & Compliance

These industrial fasteners feature precision 6-32 UNC threads with Class 3A fit tolerance, ensuring consistent threading performance and interchangeability. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming the absence of restricted substances. Critical dimensions include 0.138" thread diameter, 3/16" length, 0.262" head diameter, and 5/64" hex drive size, all manufactured to industrial-grade precision requirements.