S-92423A138 1/4"-20 x 2 3/4" ASME B18.3, NAS1352N4-44, 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 applications.
• Superior corrosion resistance from the passivated A286 stainless steel finish extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity in dynamic operations.
• High hardness (Rockwell C33) offers excellent wear resistance, maintaining thread and drive integrity through repeated use and high-stress conditions.
• Standard hex socket drive (3/16") allows for easy installation and high torque application in confined spaces, improving assembly efficiency.
• Coarse UNRC threads enable quicker installation and better performance in materials prone to stripping, speeding up production timelines.
• Compliance with ASME B18.3, NAS1352N4-44, and SAE AMS5731/5737 guarantees consistent quality and interchangeability, ensuring compatibility with industry-standard equipment.

Professional Applications & Engineering Value

This A286 Stainless Steel Socket Head Cap Screw is engineered to address demanding industrial challenges where high tensile strength and corrosion resistance are paramount. The partially threaded design with a 1/4"-20 coarse thread provides optimal grip in soft metals or composites, reducing the risk of cross-threading and material damage. Its passivated finish enhances durability in corrosive environments like chemical processing or marine applications, while the hex socket drive ensures secure fastening in tight spaces common in aerospace, automotive, and heavy machinery assemblies. By meeting rigorous standards such as ASME B18.3 and NAS1352N4-44, it delivers reliable performance in high-vibration settings, minimizing downtime and maintenance needs for long-term operational efficiency.

Specification Summary & Compliance

This screw features a Class 3A thread fit for precise dimensional accuracy, with UNRC coarse threads and a right-hand thread direction. It complies with ASME B18.3, NAS1352N4-44, SAE AMS5731, and SAE AMS5737 manufacturing specifications, ensuring adherence to industry standards for reliability and safety. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmentally responsible and regulated industrial use.