Metric Sizes 12.9 DIN 912 ISO 4762 Socket Head Cap Screw with Thermal Baked Black Oxide Plating

Metric 12.9 DIN 912 / ISO 4762 Socket Head Cap Screws with Thermal Baked Black Oxide

Metric Class 12.9 DIN 912 / ISO 4762 socket head cap screws are high-tensile fasteners engineered for demanding mechanical and structural applications. Designed with a cylindrical head and internal hex drive, these precision fasteners deliver exceptional clamping force, superior fatigue resistance, and compact installation capability. When combined with thermal baked black oxide plating, they offer enhanced surface protection and long-term reliability in industrial environments.

DIN 912 and ISO 4762 Specifications

DIN 912 and ISO 4762 are internationally recognized standards that define the dimensions, tolerances, and mechanical properties of metric socket head cap screws. These standards ensure consistent head height, socket depth, thread accuracy, and load capacity across global manufacturing applications.

Metric sizes typically range from:

• M3 through M36 diameters

• Coarse and fine thread pitch options

• Various standard and custom lengths

Class 12.9 Mechanical Strength

High Tensile Performance

Class 12.9 alloy steel fasteners are heat-treated to achieve extremely high tensile strength—typically around 1,200 MPa minimum tensile strength. This makes them ideal for high-load, high-stress assemblies where failure is not an option.

Key mechanical properties include:

• High yield strength

• Excellent fatigue resistance

• Superior shear performance

• Consistent torque retention

These characteristics make 12.9 socket head cap screws a preferred choice for precision machinery and structural assemblies.

Thermal Baked Black Oxide Plating Benefits

Thermal baked black oxide provides a uniform, matte black finish that enhances mild corrosion resistance while maintaining dimensional accuracy. Unlike thicker coatings, black oxide does not significantly alter thread fit or tolerances.

Benefits include:

• Reduced light reflection for aesthetic applications

• Improved lubricity for smoother installation

• Light corrosion protection when paired with oil sealants

• Clean, professional appearance

Common Industrial Applications

Metric 12.9 DIN 912 / ISO 4762 socket head cap screws with thermal baked black oxide plating are widely used in:

• Industrial machinery

• Automotive assemblies

• Robotics and automation systems

• Tooling and die manufacturing

• Heavy equipment fabrication

For high-strength, precision fastening in metric applications, Class 12.9 black oxide socket head cap screws deliver exceptional durability, performance, and reliability.