Hex Head Cap Screw – Grade 2 with Clear Zinc Cr3 Plating
Grade 2 Hex Head Cap Screws with clear zinc Cr3 plating are engineered for light-duty fastening applications that require dependable strength, consistent performance, and added corrosion resistance. Manufactured from low-carbon steel, these fasteners are widely used across maintenance, manufacturing, construction, and general assembly environments where affordability and reliability are key.
Mechanical Properties by Size and Length
Grade 2 hex head cap screws offer mechanical properties that vary by diameter and length to ensure safe, predictable performance. Sizes ranging from 1/4" to 3/4" in diameter and 6 inches or shorter feature a Rockwell hardness of B80 to B100, a proof load strength of 55,000 psi, and a minimum tensile strength of 74,000 psi.
For fasteners longer than 6 inches within the 1/4" to 3/4" range, or diameters over 3/4" up to 1-1/2", properties include a Rockwell hardness of B70 to B100, a 33,000 psi proof load, and a minimum tensile strength of 60,000 psi. These specifications make Grade 2 fasteners suitable for non-critical bolting where extreme loads are not present.
Advantages of Clear Zinc Cr3 Plating
Clear zinc Cr3 plating adds a thin, corrosion-resistant protective layer without affecting the fastener’s mechanical properties or thread integrity. This chromium-free (Cr3) finish replaces traditional hexavalent chromium (Cr6) plating, offering improved environmental and workplace safety. The coating protects against rust and oxidation in mildly corrosive conditions, making it suitable for light outdoor exposure and humid indoor environments.
Appearance, Sustainability, and Applications
The clear Cr3 zinc finish maintains a clean, neutral appearance without altering the base steel color, making it ideal for visible assemblies. Its environmentally responsible plating process supports compliance with modern environmental regulations while maintaining cost efficiency.
Key Benefits of Grade 2 Cr3 Zinc Hex Head Cap Screws
Low-carbon steel construction for light-duty applications
60,000–74,000 psi tensile strength depending on size
Clear zinc Cr3 plating for corrosion resistance
Environmentally friendly alternative to Cr6 coatings
Ideal for general assembly, maintenance, and light outdoor use
Grade 2 hex head cap screws with clear zinc Cr3 plating deliver a reliable balance of performance, protection, and sustainability for everyday fastening needs.
