S-92185A559 1/4"-28 x 5/8" Super-Corrosion-Resistant 316 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction with passivated finish, ideal for marine, chemical, and outdoor applications.
• Superior thread engagement and reliability with Class 3A fine UNF threads, ensuring precise, vibration-resistant fastening in high-performance assemblies.
• High tensile strength of 70,000 psi and Rockwell B70 hardness for dependable load-bearing capacity and durability under stress.
• Secure, tamper-resistant installation using a standard 3/16" hex drive, providing easy access in confined spaces with a flush socket head profile.
• Full threading along the 5/8" length for maximum adjustability and uniform clamping force across the entire fastener.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and material integrity for global industrial use.
• Right-hand thread design ensures compatibility with standard assembly tools and processes, reducing installation time.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 316 stainless steel socket head cap screw addresses critical challenges like corrosion, vibration loosening, and high-stress fatigue. The Class 3A UNF fine thread offers tighter tolerances and improved shear strength, making it suitable for precision equipment, machinery, and automotive components where reliable thread fit is paramount. The passivated finish enhances the innate corrosion resistance of 316 stainless steel, extending service life in aggressive environments such as chemical processing or marine applications. With a fully threaded design and robust 70,000 psi tensile strength, it ensures consistent clamping force and minimizes the risk of joint failure, providing long-term engineering value in assemblies requiring high integrity and compliance with industry standards.

Specification Summary & Compliance

This socket head cap screw adheres to inch system measurements with a thread size of 1/4"-28 UNF and Class 3A thread fit for high precision. It meets manufacturing standards for fine thread spacing and is fully threaded for uniform performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free of hazardous substances and suitable for regulated industrial applications.