Metric Socket Head Cap Screws

South Coast Fasteners, Inc. supplies metric socket head cap screws engineered for strength, reliability, and precision across demanding industries. Built with a recessed hex drive, these screws allow for high torque tightening while maintaining a clean, flush profile. This makes them a preferred choice in automotive, aerospace, heavy machinery, and equipment assembly, where secure fastening is essential.

South Coast Fasteners provides metric socket head cap screws manufactured to DIN and ISO standards, ensuring consistent performance and long-lasting durability. By offering a wide range of materials, grades, and finishes, we help engineers, builders, and manufacturers select the right product for their specific environment and application.

Order Premium Industrial Fasteners Today

Use the options below to order top-quality fasteners in the sizes and specifications you need. Questions about our fastener options? Contact our office in Anaheim, CA today, and our team will be happy to assist you. Whether you need repeat bulk orders or one-off small batch purchases, South Coast Fasteners has you covered for all your industrial fastener supplies.

Types of Metric Socket Head Cap Screws We Offer

Metric Class 8.8 Socket Cap Screw, DIN 912, Thermal Black Oxide

This Class 8.8 alloy steel socket cap screw delivers dependable mid-level strength and toughness for everyday machinery and equipment builds. The DIN 912 design ensures precision fit and compatibility across a wide range of assemblies. Finished in thermal black oxide, these screws gain mild corrosion resistance and a smooth dark appearance, making them useful in mechanical and industrial equipment where both performance and appearance are valued.

Metric Class 8.8 Socket Cap Screw, DIN 912, Zinc CR+3

Offering the same reliable Class 8.8 performance, this version features a bright zinc CR+3 finish for enhanced corrosion protection. The silver appearance is favored in construction, automotive, and equipment manufacturing where both strength and aesthetic consistency are required. These screws provide dependable fastening while maintaining long-term resistance to environmental wear.

Metric Class 12.9 Socket Cap Screw, DIN 912/ISO 4762, Thermal Black Oxide

Manufactured from high-strength alloy steel, Class 12.9 socket cap screws are chosen for critical applications where maximum tensile strength is necessary. The thermal black oxide finish adds a layer of mild corrosion resistance while giving the fastener a smooth, uniform surface. Common uses include aerospace, transportation, and heavy machinery where durability and safety cannot be compromised.

Metric Class 12.9 Socket Cap Screw, DIN 912/ISO 4762, Zinc CR+3 Bake

These Class 12.9 screws feature a zinc CR+3 baked finish, reducing the risk of hydrogen embrittlement while providing excellent corrosion resistance. Engineers select this option for structural assemblies, high-vibration equipment, and safety-critical installations. The baked finish ensures long-lasting strength and reliability, making them suitable for demanding environments where failure is not acceptable.

Metric Class 12.9 Socket Cap Screw, DIN 912, Zinc CR+6 Bake

This variant provides Class 12.9 strength combined with a zinc CR+6 baked finish for added protection and a slightly different visual tone compared to CR+3. The baked coating helps safeguard against environmental wear, especially in high-strength applications. These screws are commonly used in advanced manufacturing and heavy-duty assemblies that demand both strength and finish consistency.

Metric Class 12.9 Socket Cap Screw, DIN 912/ISO 4762, Mechanical Zinc CR+3

Mechanical zinc CR+3 plating provides corrosion protection without the risk of hydrogen embrittlement, making it a strong choice for high-strength Class 12.9 screws. This finish is often specified in aerospace and industrial machinery where reliability over long service life is essential. The silver coating also delivers a professional, clean appearance while maintaining durability.

Metric Stainless A2 Socket Cap Screw, DIN 912

A2 stainless steel socket cap screws combine solid strength with dependable corrosion resistance. Manufactured to DIN 912 standards, they are widely used in marine, food-grade, and outdoor environments where rust resistance is critical. These screws are valued for their balance of durability, cleanliness, and aesthetic appeal in environments where steel fasteners would degrade quickly.

Metric Stainless A4 70 Socket Cap Screw, DIN 912

For the harshest conditions, A4 70 stainless socket cap screws provide superior corrosion resistance against chlorides, saltwater, and aggressive chemicals. Their DIN 912 compliance ensures precision, while the material delivers high tensile performance in demanding applications. Offshore rigs, chemical plants, and marine engineering projects rely on these fasteners for consistent strength and longevity.

Material Options

South Coast Fasteners stocks metric socket head cap screws in the following material grades, each selected to deliver strength and durability for different environments and requirements.

Alloy Steel Class 8.8

Class 8.8 alloy steel provides a balance of strength and toughness for medium-duty fastening needs. These screws are a practical choice in automotive assemblies, machinery builds, and equipment installations where reliability and economy matter most. Their versatility makes them one of the most common options across industries.

Alloy Steel Class 12.9

Class 12.9 alloy steel offers the highest tensile strength, making it suitable for safety-critical and high-stress joints. These fasteners excel in applications subject to heavy loads, vibration, and repeated cycles, ensuring that assemblies remain secure over time. They are essential in aerospace, structural, and industrial environments where performance cannot be compromised.

Stainless Steel A2

A2 stainless steel is corrosion resistant in moisture-prone and lightly chemical environments. It is widely used in food and beverage equipment, marine hardware, and outdoor construction projects. A2 ensures long-term reliability without sacrificing strength, while also maintaining a clean, rust-free finish.

Stainless Steel A4 70

A4 70 stainless is engineered for extreme corrosion resistance, particularly in chloride and saltwater environments. It provides the durability needed for offshore, petrochemical, and marine applications where exposure to aggressive elements is constant. This material grade offers both high tensile performance and unmatched longevity.

Available Finishes

South Coast Fasteners offers metric socket head cap screws in a selection of finishes designed to protect against corrosion, extend lifespan, and meet industry-specific requirements.

Thermal Black Oxide

Thermal black oxide creates a dark, uniform surface that reduces glare and provides mild resistance to corrosion. It is commonly used in tools, machinery, and equipment where appearance and performance both matter. The finish also retains oil, which helps improve wear resistance over time.

Zinc CR+3

Zinc CR+3 delivers a silver coating that improves corrosion resistance while offering a bright, professional look. It is frequently applied in automotive, manufacturing, and construction assemblies where strength and finish are equally important. This plating provides a balance of affordability, durability, and appearance.

Zinc CR+3 Bake

The baked zinc CR+3 finish provides added protection by minimizing the risk of hydrogen embrittlement in high-strength fasteners. It is often used in safety-critical equipment and structural connections that face heavy loads or vibration. This process ensures screws maintain their mechanical integrity under demanding conditions.

Zinc CR+6 Bake

Zinc CR+6 bake offers enhanced protection and a distinctive tone compared to CR+3. Engineers specify this finish for advanced manufacturing and industrial uses where both durability and finish consistency are priorities. It ensures long-lasting performance in environments subject to moisture and frequent handling.

Mechanical Zinc CR+3

Mechanical zinc CR+3 plating avoids hydrogen embrittlement by using a mechanical application process rather than electroplating. This makes it particularly important for high-strength fasteners such as Class 12.9 screws. Aerospace, defense, and heavy equipment industries depend on this finish for reliable, corrosion-resistant fastening.

Why Choose South Coast Fasteners?

South Coast Fasteners is committed to supplying fasteners that perform under pressure and support industries where quality is non-negotiable. With decades of experience and a wide range of inventory, we understand the needs of engineers, contractors, and manufacturers alike. Customers choose us because we offer consistency, knowledgeable service, and confidence that the fasteners delivered will stand the test of time.

Order Socket Head Cap Screws Online Today

Order socket head cap screws from South Coast Fasteners with confidence, knowing stock is always available. Our straightforward ordering process makes it easy to select the right size, material, and finish for your project. Whether you need small runs for precision assemblies or bulk quantities for industrial builds, we deliver quickly and reliably, with knowledgeable support available when you need it.