S-92423A140 1/4"-20 x 3 1/2" ASME B18.3, NAS1352N4-56, SAE AMS5731, SAE AMS5737 High-Strength A286 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 160,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical assemblies.
• Superior corrosion resistance from the A286 stainless steel material and passivated finish extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections, enhancing assembly integrity in high-stress applications.
• High hardness rating (Rockwell C33) offers excellent wear resistance, maintaining thread form and drive integrity through repeated use and high torque.
• Hex socket drive design allows for easy installation and removal in confined spaces, improving assembly efficiency and reducing tool slip.
• Compliance with aerospace and industrial standards (ASME B18.3, NAS1352N4-56, SAE AMS5731/5737) ensures consistent quality and reliability for regulated applications.
• Environmental regulation adherence (RoHS 3, REACH) guarantees safe use in global markets, supporting sustainable and compliant manufacturing processes.

Professional Applications & Engineering Value

This A286 stainless steel socket head cap screw is engineered to address common challenges in demanding sectors like aerospace, automotive, and heavy machinery. Its high tensile strength (160,000 psi) and yield strength (120,000 psi) provide critical load-bearing capacity, preventing deformation under stress in engine components, structural frames, and precision equipment. The passivated finish enhances corrosion resistance, crucial for operations exposed to moisture, chemicals, or extreme temperatures, thereby reducing downtime and maintenance. With a Class 3A thread fit and coarse UNRC threads, it ensures quick, secure fastening that resists loosening from vibrations, making it ideal for dynamic environments. The partially threaded design and hex socket drive further streamline installation in tight spaces, boosting efficiency while maintaining the integrity of high-strength applications.

Specification Summary & Compliance

This screw features precise dimensions including a 1/4"-20 thread size with Class 3A fit for tight tolerance, a 3 1/2" length, and minimum thread length of 1". It adheres to ASME B18.3, NAS1352N4-56, and SAE AMS5731/5737 specifications, ensuring manufacturing consistency. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental safety and regulatory alignment for global use.