[50 PKG] Hex Head Cap Screws Grade 5 Steel Plain (USA Made) 5/16-18 x 3 1/4

Our Hex Head Cap Screws Grade 5 Steel Plain finish (USA Made) 5/16-18 x 3 1/4 deliver high strength and dependable performance for a wide range of assemblies. These fasteners are ideal for machinery, automotive, and structural projects where a strong, clean, uncoated connection is required.

• Thread/Size: 5/16-18 standard coarse thread
• Length: 3 1/4″ under the head
• Material & Finish: Grade 5 steel with a plain (uncoated) finish
• Head Type: Hex head for easy driving with a standard wrench or socket
• Origin: Made in the USA
• Typical Uses: Machinery, equipment, automotive assemblies, and other high-strength fastening needs

Why choose Grade 5 steel? These screws offer higher tensile strength than lower-grade options, delivering dependable performance under load. The plain finish keeps a clean appearance and allows on-site coatings or paint if required. For outdoor or corrosive environments, consider applying a suitable coating or selecting a plated version for enhanced corrosion resistance.

Add these hex head cap screws to your hardware kit and experience secure, durable fastening you can rely on.