Experience reliable, heavy-duty fastening with our Hex Head Cap Screws Grade 8 Steel Plain (USA Made) 5/16-18 x 3 1/2. Built for demanding applications, these screws deliver superior strength and dependable performance in real-world conditions.

• Material: Grade 8 steel for high tensile strength and durability
• Finish: Plain (untreated) finish for versatile use and compatibility
• Head type: Hex head designed for easy driving with standard tools
• Thread size: 5/16-18 UNC for secure engagement in common threaded holes and nuts
• Length: 3 1/2 inches
• Made in: USA
• Applications: Ideal for automotive, machinery, equipment assembly, and heavy-duty fastening

With Grade 8 steel, these screws offer excellent shear and tensile strength to keep assemblies secure under demanding loads. The plain finish provides flexibility across different environments, while the standard 5/16-18 thread ensures broad compatibility with existing nuts and inserts. Trust these screws for critical hardware tasks where strength and reliability matter.

Ready to upgrade your fasteners? Add these Hex Head Cap Screws to your cart and tackle tough projects with confidence.