S-92185A128 4-40 x 1 3/4" Super-Corrosion-Resistant 316 Stainless Steel Socket Head 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 B70 hardness for reliable load-bearing performance
• Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening in industrial applications
• Optimized drive efficiency through standard hex socket design with 3/32" drive size for easy installation
• Versatile partial threading allowing both threaded and unthreaded sections for flexible assembly requirements
• Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Durable socket head profile providing reliable torque transmission and reduced stripping risk

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel socket head cap screws deliver exceptional performance where corrosion resistance and mechanical integrity are critical. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making these UNC thread fasteners ideal for chemical processing, marine applications, and food equipment where exposure to moisture and aggressive substances is common. The coarse 4-40 UNC threads provide superior engagement in softer materials and faster assembly in production environments, while the partially threaded design offers precise clamping control. The hex socket drive system ensures maximum torque transmission without cam-out, reducing installation time and improving workplace efficiency in automated assembly lines and maintenance operations.

Specification Summary & Compliance

These socket head cap screws feature precision 4-40 UNC Class 3A threads with coarse thread spacing, ensuring tight tolerances and reliable fitment. The 1 3/4" length includes a minimum thread length of 3/4" for secure fastening applications. Manufactured from 316 stainless steel with Rockwell B70 hardness and 70,000 psi tensile strength, these fasteners meet rigorous industrial standards. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial distribution and use.