Hexagon socket threaded plug with collar Steel, zinc-nickel-plated silver (ZNSHL), NBR sealing ring

Fasteners with a galvanised chromium (VI)-free zinc-nickel-plated silver coating (ZNSHL) 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 - 600 h*


• Diameter ≥ M10 - 720 h*

*No base metal corrosion in areas without thread in salt spray tests according to 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


• Adjusted friction coefficient range from 0.09-0.14 μ due to top coat with integrated lubricating particles


• Thermal capacity up to 120 °C


• Even coating distribution


• Functional and decorative