Metric Sizes 12.9 DIN 912 ISO 4762 Socket Head Cap Screw with Clear Cr3 Zinc Plating

Metric 12.9 DIN 912 / ISO 4762 Socket Head Cap Screws with Clear Cr3 Zinc Plating

Metric Class 12.9 DIN 912 / ISO 4762 socket head cap screws are precision-engineered fasteners designed for high-load, high-performance mechanical assemblies. Manufactured from alloy steel and heat-treated to Class 12.9 specifications, these screws deliver exceptional tensile strength, superior clamping force, and outstanding reliability in demanding industrial environments. Finished with clear Cr3 zinc plating, they also provide enhanced corrosion resistance while maintaining accurate thread tolerances.

DIN 912 and ISO 4762 Compliance

DIN 912 and ISO 4762 are internationally recognized standards that define the dimensions, head configuration, socket depth, and mechanical requirements of metric socket head cap screws. These standards ensure consistent fit, interchangeability, and performance across global applications.

Common metric sizes include:

• M3 through M36 diameters

• Standard coarse thread pitch

• Various standard and extended lengths

The cylindrical head and internal hex (Allen) drive allow for high torque installation in tight or recessed areas, making them ideal for compact mechanical assemblies.

Class 12.9 Mechanical Strength

High Tensile and Yield Performance

Class 12.9 fasteners are quenched and tempered alloy steel screws with a minimum tensile strength of approximately 1,200 MPa. They are engineered for high-stress environments where strength and durability are critical.

Key performance features include:

• Excellent fatigue resistance

• High shear capacity

• Strong clamp load retention

• Consistent torque performance

These properties make 12.9 socket head cap screws a preferred choice in heavy machinery, tooling, and structural applications.

Clear Cr3 Zinc Plating Benefits

Clear Cr3 (trivalent chromium) zinc plating provides moderate corrosion protection while meeting modern environmental regulations. Unlike hexavalent chromium finishes, Cr3 plating is RoHS-compliant and environmentally responsible.

Advantages include:

• Bright silver finish for a clean, professional appearance

• Improved corrosion resistance in indoor and light outdoor environments

• Minimal impact on thread fit and dimensional accuracy

• Smooth installation with reduced friction

Common Applications

Metric 12.9 DIN 912 / ISO 4762 socket head cap screws with clear Cr3 zinc plating are widely used in:

• Industrial machinery

• Automotive components

• Robotics and automation systems

• Equipment manufacturing

• Tool and die assemblies

For high-strength metric fastening with corrosion protection, Class 12.9 clear zinc socket head cap screws deliver precision, durability, and dependable performance.