Dear customers and friends：
Introduction
Fastenboen's DIN 7991 Button Head Screws are engineered to meet the rigorous demands of modern industrial applications. With grades ranging from 4.8 to 12.9 and advanced corrosion-resistant coatings, these screws are designed for durability, precision, and reliability. This article explores their technical specifications, applications, and the company's commitment to quality.
Key Features
- Optimized Load Distribution: Radially curved bearing surfaces minimize point loading on soft substrates like composites and cast alloys.
- High-Torque Drive System: Extended socket depth (≥1.5× nominal diameter) ensures robust torque transmission.
- Performance-Graded Materials: Available in 12.9/10.9/8.8 strength classes using SCM435 alloy steel.
- Corrosion Protection: Black oxide coating (≥96h salt spray) and Geomet® coating (≥720h) for harsh environments.
Technical Specifications
| Parameter | Details |
|---|---|
| Grade | 12.9, 10.9, 8.8, 4.8 |
| Material | SCM435 Alloy Steel |
| Coating | Black Oxide, Geomet® |
| Head Height Tolerance | ±0.20mm (e.g., M6: 4.0mm vs. DIN 912’s 6.0mm) |
| Socket Depth | ≥1.5× nominal diameter (per DIN 7991:2014) |
Applications
- Aerospace: Reduces weight in turbine assemblies with reduced head height.
- Automotive: Curved head prevents thread galling in aluminum engine blocks.
- Medical: Passivated stainless steel meets ISO 13485 biocompatibility standards.
- Precision Engineering: Head-to-shank transition radius ≥0.1d reduces stress concentration.
Product Images
Company Background
Shijiazhuang Dellee Ming Garments Co., Ltd. is a trusted manufacturer specializing in high-quality fasteners. With over 20 years of global export experience, the company ensures compliance with international standards and provides reliable after-sales support. Their commitment to innovation and customer satisfaction makes them a preferred partner for industrial and commercial applications.
Service Commitment
- Reliable After-Sales Support: Swift resolution for technical issues and product inquiries.
- Customizable Spec Sheets: Detailed product specifications on request.
- Instant Quote Response: Prompt pricing and solution proposals.
- Custom Packaging: Branded/secure packaging with pre-shipment visual verification.
References
For further information on industry standards, refer to the National Institute of Standards and Technology (NIST).
Post time: Aug . 12, 2025 11:10
