[25 PKG] Hex Head Cap Screws Grade 8 Steel Plain Fine Thread 5/8-18 x 3 1/2″” (PT)

When strength, precision, and reliability matter in your assemblies, choose our Hex Head Cap Screws made from Grade 8 steel with a plain, uncoated finish. The fine-thread 5/8-18 size paired with a 3 1/2 inch length delivers exceptional clamping power for demanding automotive, machinery, and construction applications. Built for heavy-duty performance, these screws resist loosening under vibration and provide consistent torque in critical joints.

Specifications

• Material: Grade 8 steel for high-strength performance.
• Finish: Plain (uncoated) finish.
• Head style: Hex head for easy driving with standard wrenches or sockets.
• Thread: Fine thread with 18 threads per inch (5/8″ diameter).
• Length: 3 1/2 inches overall.

Applications

Ideal for heavy-duty assemblies in automotive, industrial equipment, machinery, and construction. The Grade 8 steel construction provides superior tensile strength to handle demanding fastening tasks, while the hex head enables quick, secure installation with common tools.