S-92185A572 5/16"-18 x 3 1/4" 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 and passivated finish
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threads, reducing the risk of loosening under vibration
• Easy installation in confined spaces with a standard 1/4" hex drive and socket head design
• Optimized for partial-thread applications where unthreaded shank sections provide enhanced shear resistance and alignment
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries
• Durable, long-lasting performance with coarse right-hand threads that resist stripping and facilitate quick assembly

Professional Applications & Engineering Value

This 316 Stainless Steel Socket Head Cap Screw is engineered to address critical challenges in industrial and marine settings where corrosion and mechanical stress are prevalent. The passivated finish enhances the innate corrosion resistance of 316 stainless, making it ideal for chemical processing, offshore equipment, and food-grade machinery. Its UNC coarse threads and Class 3A fit provide superior thread engagement and vibration resistance, reducing maintenance needs in dynamic assemblies. The partially threaded design allows the unthreaded portion to act as a precision dowel, improving alignment in automated systems and structural frameworks. With a 1/4" hex drive, it enables high-torque installation without slippage, ensuring reliable performance in high-stress industrial fastening applications.

Specification Summary & Compliance

This socket head cap screw adheres to inch system dimensions, featuring a 5/16"-18 UNC coarse thread with Class 3A precision fit for tight tolerances. Manufacturing complies with applicable standards for thread form and mechanical properties, including a tensile strength of 70,000 psi and Rockwell B70 hardness. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substance restrictions.