S-90346A129 1/4"-20 x 1 3/4" ASME B18.3 High-Strength 316 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 316 stainless steel construction, ideal for harsh environments and chemical exposure.
• Superior fastening reliability with a Class 3A thread fit, ensuring tight, secure connections and reduced risk of loosening.
• High mechanical strength with 110,000 psi tensile strength and Rockwell C25 hardness for demanding, high-stress applications.
• Optimized for efficient assembly featuring a 3/16" hex drive and standard socket head profile for easy installation with standard tools.
• Robust durability from the cold worked fabrication process, enhancing the material's structural integrity and longevity.
• Wide industrial compatibility with UNC coarse threading and a 1-3/4" length, suitable for various assembly needs.
• Compliance with major standards including ASME B18.3, ensuring consistent quality and performance in professional settings.

Professional Applications & Engineering Value

This 316 Stainless Steel Socket Head Cap Screw is engineered to address critical challenges in industrial and marine environments where corrosion and high stress are common. The UNC coarse thread and Class 3A fit provide exceptional grip and vibration resistance, minimizing the risk of joint failure in machinery, automotive assemblies, and structural frameworks. Its high tensile strength and cold worked fabrication ensure reliable performance under heavy loads, while the hex socket drive allows for precise torque application in confined spaces. Ideal for applications requiring durable, corrosion-resistant fasteners, this screw delivers long-term value by reducing maintenance needs and enhancing operational safety in demanding sectors like chemical processing, offshore equipment, and aerospace.

Specification Summary & Compliance

This product adheres to precise dimensional standards with a Class 3A thread fit and UNC coarse threading (1/4"-20), ensuring high accuracy and interchangeability. It meets the ASME B18.3 specification for socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. The manufacturing process follows cold worked techniques to achieve consistent mechanical properties, supporting reliable use in regulated industrial applications.