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Dome Nut Spec Table
Dome Nut Specifications — 5 sizes
DIN 1587
This specification follows DIN (Deutsches Institut für Normung, German Industrial Standard). It is essential when maintaining German or European-sourced equipment and when supplying to the European market.
Similar to a cap nut, it covers the bolt end for a safe and clean finish.
Practical Notes
- For airtight applications, combine with sealing tape or gaskets. The nut alone may not achieve full sealing.
- Like cap nuts, bolt length must be precise. Bolts hitting the internal bottom cause assembly failure.
Selection Guide
Similar to cap nuts but with a flat closed end instead of a dome. Suited for airtight and watertight applications — food machinery, chemical equipment, water treatment where dust and moisture must be blocked.
DINDome Nut
5 sizes| Nominal | d | P | H (Height) | B (Wrench) | Other |
|---|---|---|---|---|---|
| M4 | 4 | 0.7 | 8 | 7 | - |
| M5 | 5 | 0.8 | 9.5 | 8 | - |
| M6 | 6 | 1 | 11.5 | 10 | - |
| M8 | 8 | 1.25 | 15 | 13 | - |
| M10 | 10 | 1.5 | 18 | 17 | - |
Key Features
- Closed end blocks bolt penetration; prevents dust and moisture ingress
- Unlike cap nuts, flat closed end suits airtight and watertight applications
- Stainless steel or brass material ensures corrosion resistance for food/chemical environments
Key Applications
Food machine hygienic fastening, chemical piping seals, water treatment, cleanroom equipment, pharmaceutical equipment
FAQ
Difference between blind nut and cap nut?
Cap nuts have domed finish; blind nuts have flat closed ends. Blind nuts suit airtight/watertight needs; cap nuts look better for aesthetics.