S-92185A131 4-40 x 2" Super-Corrosion-Resistant 316 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precise thread engagement with Class 3A fit ensuring tight tolerances and vibration resistance in critical assemblies
• Optimized drive efficiency featuring a standard hex socket (3/32") for secure tool engagement and reduced cam-out risk
• Enhanced durability through passivated surface treatment, improving corrosion resistance and surface longevity
• Versatile partial threading (3/4" min thread on 2" length) providing both gripping strength and unthreaded shank flexibility
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring environmental safety and global market acceptance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 316 stainless steel socket head cap screws deliver critical performance advantages in corrosive or high-stress environments. The combination of 4-40 UNC coarse threads and Class 3A thread fit ensures secure fastening in machinery, automotive components, and marine equipment where vibration resistance is paramount. The passivated finish significantly enhances the natural corrosion resistance of 316 stainless steel, making these fasteners ideal for chemical processing, food equipment, and offshore applications. With 70,000 psi tensile strength and partial threading design, they provide optimal clamp load distribution while allowing for precise adjustment in assemblies requiring both threaded and unthreaded sections.

Specification Summary & Compliance

This socket head cap screw maintains Class 3A thread fit per UNC standards with precise dimensional control (0.112" thread diameter, 2" length). Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental compliance. The coarse thread spacing and right-hand thread direction provide industry-standard compatibility, while the Rockwell B70 hardness and 70,000 psi tensile strength meet rigorous mechanical requirements for industrial fastening applications.