S-98201A413 5/16"-18 x 1 1/4" Exact-Grip-Length Flanged Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• High tensile strength of 80,000 PSI ensures reliable load-bearing capacity and joint integrity under stress.
• Precise Class 3A thread fit provides excellent engagement and vibration resistance in critical assemblies.
• Integrated flange design eliminates the need for separate washers, simplifying installation and reducing part count.
• Rockwell B83 hardness offers excellent wear resistance and durability for long-term performance.
• 1/4" hex drive socket allows for high-torque installation with standard tools, minimizing stripping risks.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance in global markets.

Professional Applications & Engineering Value

This flanged socket head cap screw in 18-8 stainless steel is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The coarse UNC thread and Class 3A fit ensure quick, secure fastening in machinery, automotive, and structural applications where reliability is critical. The built-in flange distributes clamping force evenly, reducing surface damage and improving seal integrity. With a partially threaded design and right-hand thread, it provides optimal grip length for precise tension control, making it a top choice for engineers seeking corrosion-resistant fasteners that maintain performance under demanding conditions.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision. Key dimensions include a 5/16"-18 thread size, 1-1/4" length, and 1/4" hex drive. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industrial use.