Depend on industrial-grade strength with our Hex Head Cap Screws Grade 8 Steel Plain, USA Made. Size 5/8-11 x 3-1/4, these hex head fasteners are engineered for heavy-duty assembly where high tensile strength and reliable performance matter. The plain finish (uncoated) keeps the screw suitable for environments where coatings arent desired or required.

Key features

• Material: SAE Grade 8 steel for exceptional strength
• Finish: Plain (uncoated)
• Head style: Hex head cap screw for straightforward tightening with standard wrenches
• Thread format: Coarse 5/8-11 UNC
• Diameter x length: 5/8″ diameter, 3-1/4″ length
• Origin: Made in the USA

Specifications

• Diameter: 5/8 in
• Thread pitch: 11 TPI (5/8-11 UNC)
• Length: 3-1/4 in
• Material: SAE Grade 8 steel
• Finish: Plain
• Head type: Hex head cap screw
• Country of origin: USA

Applications

Designed for heavy-duty fastening in machinery, automotive, construction, and industrial equipment. The high-strength Grade 8 steel provides superior performance under load, while the coarse 5/8-11 threads ensure robust engagement in a variety of materials. Ideal for assemblies that demand reliability and long service life.