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Fasteners with a zinc plated chromium(VI)-free black zinc-nickel coating (ZNBHL) are suitable for applications with a high risk of corrosion. The coating comprises a zinc-nickel plated alloy layer and a sealing coat (top coat with integrated lubricating particles).
Corrosion resistance:
- Diameter ≥ M2 - 360 h*
- Diameter ≥ M4 - 480 h*
- Diameter ≥ M10 - 720 h*
- *No base metal corrosion in unthreaded areas in salt spray tests in accordance with DIN EN ISO 9227 NSS
Overview of advantages:
- Resistance of up to 720 hours against base metal corrosion in accordance with DIN EN ISO 9227 NSS
- Chromium(VI)-free
- Top coat with integrated lubricating particles adjusts the friction coefficient range to 0.09-0.14 μ
- Thermal resistance up to 120 °C
- Even coating distribution
- Functional and decorative
ISO EN 1664 replaces DIN 6927 | There is some limited similarity | Nuts with fine thread included in DIN EN 1667 | Nut height changed | Width across flats changed from 15 mm to 16 mm for M10 dimension.
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