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Countersunk screw with hexalobular head ISO 14581, steel, strength class 8.8, zinc-nickel-plated, black (ZNBHL)
Countersunk screw with hexalobular head ISO 14581, steel, strength class 8.8, zinc-nickel-plated, black (ZNBHL) - 1 Countersunk screw with hexalobular head ISO 14581, steel, strength class 8.8, zinc-nickel-plated, black (ZNBHL) - 2
Countersunk screw with hexalobular head ISO 14581, steel, strength class 8.8, zinc-nickel-plated, black (ZNBHL) - 1
Countersunk screw with hexalobular head ISO 14581, steel, strength class 8.8, zinc-nickel-plated, black (ZNBHL) - 2

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Countersunk screw with hexalobular head ISO 14581, steel, strength class 8.8, zinc-nickel-plated, black (ZNBHL)

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Fasteners with a zinc-plated chromium (VI)-free zinc-nickel black coating (ZNBHL) are suitable for applications with a high risk of corrosion. The coating comprises a zinc-nickel alloy layer and a sealing coat (top coat with integrated lubricating particles).



Corrosion resistance:



  • Diameter ≥ M2 – 360h*

  • Diameter ≥ M4 – 480h*

  • Diameter ≥ M10 – 720h*


  • *No base metal corrosion at points without thread in salt spray mist testing according to DIN EN ISO 9227 NSS


Overview of advantages:



  • Corrosion 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 0.09μ - 0.14μ due to top coat with integrated lubricating particles

  • Thermal capacity up to 120°C

  • Even coating distribution

  • Functional and decorative
Notice
  • Head dimensions in ISO 14581 countersunk screws are gauged in accordance with ISO 7721

  • Some screws with short dimensions are threaded up to the head, see also ISO 14581

  • Countersinks for screw heads in accordance with ISO 14581 must comply with ISO 15065