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What are DIN 912 Socket Head Cap Screws?
DIN 912 socket head cap screws are metric fasteners featuring a cylindrical head and an internal hex drive, also known as an Allen drive. They are designed for installation with a matching hex key or Allen bit and are commonly used in tapped holes where a strong, compact fastening solution is required.
DIN 912 is the legacy German standard, with ISO 4762 serving as its international successor. Both standards describe the familiar socket head cap screw design, which is widely used in industrial machinery, mechanical assemblies, and equipment manufacturing. DIN 912 remains a common designation in product listings, engineering drawings, and purchasing specifications.
What material and finish are DIN 912 Socket Head Cap Screws made from?
These socket head cap screws are manufactured from Class 12.9 high-strength steel with a black oxide finish. Class 12.9 steel provides high tensile strength and hardness for demanding mechanical fastening applications. Black oxide is a surface treatment that creates a dark, low-reflectivity appearance and offers limited corrosion protection. It is commonly selected for machinery, tooling, and mechanical assemblies where a black finish is desirable and enhanced corrosion resistance is not the primary requirement.
Why choose Class 12.9 Black Oxide DIN 912 Socket Head Cap Screws?
Class 12.9 black oxide socket head cap screws are an excellent choice for applications requiring high-strength fastening in a compact design. The internal hex drive allows for installation in confined spaces, while the cylindrical head provides a practical bearing surface for secure fastening. The black oxide finish is widely used in industrial and mechanical applications because of its dark appearance and suitability for tooling and equipment. These fasteners are particularly useful when high mechanical strength and a consistent black finish are priorities.
Where are Black Oxide DIN 912 Socket Head Cap Screws commonly used?
Black oxide DIN 912 / ISO 4762 socket head cap screws are commonly used in machine tools, industrial machinery, automation systems, robotics, fixtures, jigs, tooling, equipment manufacturing, and general mechanical assemblies. They are also widely used in maintenance, repair, and OEM production where high-strength metric fasteners are required. The dark finish is particularly suitable for machinery and tooling where a low-reflectivity appearance is preferred. For applications exposed to moisture, salt, or corrosive environments, additional corrosion protection or a more corrosion-resistant fastener finish may be necessary.
