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Introduction
Fastenboen's DIN 7991 Button Head Screws represent a pinnacle of engineering innovation, designed to meet the rigorous demands of modern industrial applications. These high-performance fasteners are engineered to deliver optimized load distribution, superior torque resistance, and exceptional corrosion protection. With grades ranging from 4.8 to 12.9 and advanced coating technologies, they are ideal for aerospace, automotive, medical, and precision engineering sectors. This article delves into the technical specifications, applications, and the company's commitment to quality, ensuring a comprehensive understanding of this critical component.
Product Features and Technical Specifications
The DIN 7991 Button Head Screws are engineered with precision to address the unique challenges of heavy machinery and critical applications. Below is a detailed breakdown of their key features:
Optimized Load Distribution
The radially curved bearing surface of these screws minimizes point loading on soft substrates such as composites and cast alloys, ensuring even stress distribution. For example, the head height tolerance of ±0.20mm (e.g., M6: 4.0mm vs. DIN 912’s 6.0mm) reduces the risk of material deformation and enhances structural integrity.
High-Torque Drive System
Featuring an extended socket depth of ≥1.5× nominal diameter (per DIN 7991:2014 Sec. 4.3), these screws are designed for high-torque applications. The drive conformity adheres to ISO 10664 Class C standards, with a tolerance of ±0.028mm, ensuring reliable performance even under extreme conditions.
Performance-Graded Materials
Manufactured from SCM435 alloy steel, the screws are available in strength classes 12.9, 10.9, 8.8, and 4.8. These grades offer varying levels of mechanical strength, making them suitable for diverse applications. The corrosion resistance is further enhanced with black oxide coating (≥96h salt spray) and Geomet® coating (≥720h), ensuring longevity in harsh environments.
Product Specifications Table
| Parameter | Details |
|---|---|
| Material | SCM435 Alloy Steel |
| Strength Classes | 12.9, 10.9, 8.8, 4.8 |
| Coating Options | Black Oxide (≥96h salt spray), Geomet® (≥720h) |
| Head Height Tolerance | ±0.20mm |
| Socket Depth | ≥1.5× Nominal Diameter |
| Drive Conformity | ISO 10664 Class C (±0.028mm) |
| Applications | Aerospace, Automotive, Medical, Precision Engineering |
Key Applications and Industry Use Cases
The DIN 7991 Button Head Screws are tailored for high-stakes environments where performance and reliability are non-negotiable. Below are some critical applications:
Aerospace
The reduced head height of these screws contributes to weight savings in turbine assemblies, a critical factor in aerospace engineering. Their high-strength grades and corrosion resistance ensure durability in extreme conditions.
Automotive
In automotive applications, the radially curved head design prevents thread galling in aluminum engine blocks, a common issue in high-torque environments. The Geomet® coating further enhances resistance to wear and tear.
Medical
For medical devices, the screws are available in passivated stainless steel, meeting ISO 13485 biocompatibility standards. This ensures they are safe for use in critical medical equipment and implants.
Precision Engineering
The head-to-shank transition radius of ≥0.1d (vs. DIN’s ≥0.08d) minimizes stress concentration, making these screws ideal for precision machinery where fatigue resistance is paramount.
Company Background and Commitment to Quality
Shijiazhuang Dellee Ming Garments Co., Ltd. (the company behind these fasteners) has over 20 years of experience in global exports, specializing in high-quality industrial components. The company’s DIN 7991 Button Head Screws are a testament to their dedication to innovation and customer satisfaction. Their services include:
- Reliable After-Sales Support: Swift resolution for technical issues and product inquiries.
- Customizable Spec Sheets: Detailed product specifications tailored to customer needs.
- Instant Quote Response: Prompt pricing and solution proposals for efficient decision-making.
- Custom Packaging: Secure packaging with pre-shipment visual verification to ensure product integrity.
With a focus on premium quality at competitive pricing, Shijiazhuang Dellee Ming Garments Co., Ltd. continues to set industry benchmarks for performance and reliability.
Conclusion
The DIN 7991 Button Head Screws are a critical component in modern engineering, offering unmatched performance in demanding applications. Their advanced design, superior materials, and rigorous testing ensure they meet the highest standards of quality and durability. Whether in aerospace, automotive, medical, or precision engineering, these screws deliver the reliability needed to drive innovation. For more information, visit the product page or contact the company directly.
References
Source: National Institute of Standards and Technology (NIST)
NIST plays a pivotal role in advancing technology through precise measurements and research. Their work in standards and innovation aligns with the principles of quality and reliability emphasized in the DIN 7991 Button Head Screws product line.
Additional Product Images
Explore the DIN 7991 Button Head Screws in detail with these images:
Post time: Aug . 12, 2025 02:15
