DIN7991 Stainless Steel 304 SS304 Countersunk Allen Head Socket Machine Screw

DIN7991 Stainless Steel 304 SS304 Countersunk Allen Head Socket Machine Screw

Hex Socket Flat Countersunk Head Cap Screw DIN 7991

Definition:
The hex socket flat countersunk head cap screw, compliant with DIN 7991, is a type of threaded fastener with a flat countersunk head and an internal hexagonal drive. Its design allows the head to sit flush or slightly below the installation surface.

Features:

1. Flat Countersunk Head:
   Ensures a smooth surface after installation, making it ideal for applications requiring a clean and flush finish.

2. Hex Socket Drive:
   Provides reliable torque transfer and prevents cam-out during tightening. It is suitable for use in limited spaces with hex keys or tools.

3. Material and Finish:
   Commonly made from carbon steel, alloy steel, or stainless steel, with optional surface treatments such as black oxide, zinc plating, or nickel plating for enhanced corrosion resistance.

4. Standardized Dimensions:
   The DIN 7991 standard specifies precise dimensions and mechanical properties, ensuring compatibility and consistency across applications.

Applications:

1. Electronics:
   Used in devices where a flush surface is critical for aesthetics or functionality, such as in electronic enclosures.

2. Machinery and Equipment:
   Ideal for securing components in machines where protruding heads could interfere with operations.

3. Furniture and Interior Design:
   Frequently used in furniture assembly to achieve a sleek and polished appearance.

4. Aerospace and Automotive Industries:
   Trusted in high-precision applications requiring secure fastening and minimal surface interference.

Company Services

Haina is committed to providing customers with high-quality stainless steel standard fasteners and professional services to meet various engineering needs. We have a large amount of spot inventory to ensure fast delivery and save you waiting time. In addition, we provide the following value-added services to help your purchasing experience:

1. Free samples: provide samples for customer testing.

2. 3.1 Test report: quality test report that meets international standards.

3. Video factory inspection: support video factory inspection to demonstrate production process and quality management.

Advantages

- Sufficient inventory: quick response to order requirements.

- Quality assurance: strict quality control to ensure product reliability.

Haina is committed to providing efficient and high-quality fastener services.

FAQ

What are machine screws?

Machine screws are small, threaded fasteners designed to be used with pre-tapped holes or nuts to secure parts together.

What are machine screws used for?

Machine screws are used in applications such as electronics, machinery, automotive parts, furniture assembly, and more.

What is the difference between a machine screw and a bolt?

Machine screws are smaller, designed for precise applications, and often used with tapped holes, while bolts are typically larger and used with nuts.