Our Hex Head Cap Screws Grade 8 Steel Zinc Yellow Plated 5/16-18 X 4-1/4 are designed for demanding fastening tasks that require exceptional strength and durability. The Grade 8 steel provides high tensile strength, while the zinc yellow plating offers corrosion resistance and a bright, attractive finish for visible or exposed hardware.

Specifications

• Material: Grade 8 steel
• Finish: Zinc yellow plated
• Head type: Hex head
• Thread size: 5/16-18 (coarse)
• Length: 4-1/4 in

Applications

Ideal for automotive, machinery, and equipment assemblies where a strong, reliable fastener is essential. The 5/16-18 coarse thread provides quick, secure threaded engagement in a variety of substrates.

Why choose Grade 8 steel hex screws?

Grade 8 screws offer superior strength and fatigue resistance, making them a go-to choice for critical fastening tasks. Combined with a durable zinc yellow finish, these screws deliver both performance and appealing appearance in functional and semi-visible installations.

Tip: For best results, use the appropriate driver size and follow standard torque guidelines for Grade 8 fasteners to ensure proper clamp load without over-tightening.