Product Details
Our Black Zinc Oxide DIN 1587 Cap Nuts are manufactured to deliver superior performance, durability, and a professional appearance.
- Durable Black Zinc Oxide Finish: This finish is a two-layer coating process. A base layer of zinc plating provides sacrificial corrosion protection, while a black chromate conversion topcoat (often called black oxide over zinc) adds a uniform, semi-gloss black appearance and further enhances resistance to corrosion and wear. This finish is less reflective than bright platings, making it ideal for industrial machinery where a low-glare, durable black component is preferred.
- High-Strength Carbon Steel Core: The nut is made from high-quality carbon steel and is available in various property classes, including standard Class 4.8 for general use and high-strength Class 8.8, 10.9, and 12.9 for load-bearing and critical applications. This allows you to select the appropriate strength for your specific machinery or structural requirements.
- Dual-Function Domed Design: The signature hemispherical dome serves two critical functions:
- Aesthetics & Safety: It provides a clean, finished appearance by hiding the exposed, often sharp, end of a bolt or stud. This prevents snagging and protects personnel from injury.
- Thread Protection: The cap effectively seals the thread end from moisture, dirt, and physical impact, preventing rust and damage that could compromise the fastener’s integrity.
- DIN 1587 Standard for a Perfect Fit: Manufactured in strict compliance with the DIN 1587 standard, these nuts guarantee uniform hexagonal dimensions, dome height, and thread profiles. This ensures a consistent, secure, and professional fit for every application.
Product Parameters
The technical specifications for our Black Zinc Oxide DIN 1587 Hex Domed Cap Nuts are detailed below.
| Parameter | Specification |
|---|
| Product Name | DIN 1587 Hex Domed Cap Nut (Acorn Nut) |
| Standard | DIN 1587 |
| Material | Carbon Steel |
| Grade / Class | 4.8, 8.8, 10.9, 12.9 |
| Surface Treatment | Black Zinc Oxide |
| Size Range | M4 – M24 |
| Brand Name | Duojia |
| Place of Origin | Hebei, China |
| Measurement System | Metric |
| Application | Machinery, Heavy Industry, General Industry, Automotive |
Product Features
Our Black Zinc Oxide Cap Nuts are the ideal choice for industrial applications requiring a durable and discreet finish.
- Durable and Protective Finish: The Black Zinc Oxide coating offers excellent corrosion and wear resistance, making it suitable for demanding industrial and outdoor environments.
- Professional, Non-Reflective Appearance: The uniform black finish provides a sleek, low-glare look that seamlessly integrates with most machinery and equipment designs.
- High-Strength for Load-Bearing Use: Available in high-strength grades (8.8 and above), these nuts are suitable for structural and load-bearing connections, not just decorative purposes.
- Enhanced Safety: The smooth, domed cap covers sharp thread ends, reducing the risk of injury to operators and damage to adjacent components.
- Cost-Effective Performance: Provides a great balance of corrosion resistance, strength, and aesthetic appeal at a more economical price point than stainless steel.
Product Applications
The robust and functional design of these nuts makes them perfect for a wide range of industrial and commercial uses.
- Machinery and Industrial Equipment: Ideal for finishing safety guards, control panels, access covers, and machine frames, providing a durable and professional look.
- Automotive Industry: Used for engine bay components, chassis fasteners, and interior/exterior trim where a black finish is required for aesthetic or functional reasons.
- Electronics and Enclosures: Perfect for assembling server racks, electrical cabinets, and other enclosures, offering a clean, black-on-black appearance.
- Industrial Furniture and Fixtures: Provides a durable and aesthetically matching fastener for industrial-style shelving, workbenches, and office furniture.
- General Manufacturing: A versatile fastener for any application where exposed threads need to be covered for safety, protection, and a clean, finished look.
