S-97646A150 5/16"-18 x 3/4" 18-8 Stainless Steel Serrated-Flange Hex 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 100,000 psi ensures reliable performance under heavy loads and vibration
• Integrated flange design eliminates the need for separate washers, simplifying installation and reducing assembly time
• Class 2A thread fit with UNC coarse threading provides secure, reliable fastening with excellent resistance to loosening
• External hex drive and hex head allow for high torque application with standard tools, preventing stripping
• Full threading along the entire 3/4" length ensures maximum grip and load distribution across the entire fastener
• Compliance with RoHS 3 and REACH standards guarantees environmental safety and regulatory acceptance for global projects

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw in 18-8 stainless steel addresses critical industrial fastening challenges where corrosion resistance and structural integrity are paramount. The flanged design provides distributed bearing pressure, preventing surface damage and maintaining joint integrity in high-vibration applications such as machinery assembly, structural frameworks, and automotive components. The coarse UNC threading and Class 2A fit ensure quick installation and reliable performance in materials where fine threads might strip or fail. With 100,000 psi tensile strength and Rockwell B100 hardness, this fully threaded screw maintains clamping force under dynamic loads, making it ideal for heavy-duty industrial fasteners in manufacturing, construction, and equipment maintenance where durability and compliance with RoHS and REACH standards are required.

Specification Summary & Compliance

This flanged hex head screw features precise Class 2A thread fit with 5/16"-18 UNC coarse threads in a right-hand direction, ensuring compatibility with standard inch-system components. Manufacturing adheres to strict dimensional controls with a length of 3/4", flange diameter of 11/16", and full threading for consistent performance. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for regulated industries and international supply chains.