S-98201A511 3/8"-16 x 1 1/4" Exact-Grip-Length Flanged Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 PSI ensures reliable performance under heavy loads and vibration
• Class 3A thread fit precision provides secure, tight fastening with minimal risk of loosening
• Integrated flange design eliminates the need for separate washers, simplifying installation and reducing assembly time
• Rockwell B83 hardness rating offers superior durability and resistance to wear and deformation
• 5/16" hex drive socket allows for easy installation with standard tools in confined spaces
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global applications

Professional Applications & Engineering Value

This 3/8"-16 UNC flanged socket head cap screw is engineered to address critical fastening challenges in demanding industrial settings. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in chemical processing, marine equipment, and food machinery where moisture and contaminants are present. The coarse UNC threads with Class 3A fit ensure rapid assembly and reliable grip in materials like cast iron or soft metals, reducing the risk of cross-threading. The integrated flange distributes clamping force evenly, preventing surface damage and maintaining joint integrity under dynamic loads. With a partially threaded design and 5/8" grip length, it offers precise control in assemblies requiring unthreaded shank sections for alignment, commonly used in machinery, automotive components, and structural frameworks where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a Class 3A thread fit for high precision and consistent performance. Dimensions include a 3/8"-16 thread size, 1 1/4" length, and 5/16" hex drive. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in environmentally sensitive and regulated industries.