Hex Head Cap Screws Grade 8 Steel Zinc Yellow Bake Fine Thread 5/8-18 x 4″ (PT) are engineered for high-strength fastening in demanding industrial and automotive applications. These screws combine premium Grade 8 steel with a durable zinc yellow baked finish for corrosion resistance and visibility.

Constructed from Grade 8 steel, these screws offer excellent tensile strength and durability. The zinc yellow baked finish provides corrosion resistance and a distinctive yellow-chrome appearance, making them ideal for environments where both protection and visibility matter.

Key specifications

• Head style: Hex head
• Material: Grade 8 steel
• Finish: Zinc yellow baked
• Thread type: Fine thread
• Size: 5/8-18
• Length: 4 inches
• Packaging: (PT) as specified

Benefits and applications

These screws are designed for high-torque assemblies in automotive, machinery, and equipment installations. The fine thread improves alignment and helps resist loosening in vibration-prone settings. Use with compatible nuts or tapped holes to create strong, secure joints in metal-to-metal connections.

How to use: Align parts, insert, and tighten with a properly sized hex driver or wrench to the recommended torque. Always follow the manufacturer’s torque specs for Grade 8 fasteners to ensure proper clamping force and safety.