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Hexalobular screw, cylindrical head
ISO 4762, TX, steel 10.9, zinc-nickel, black (ZNBHL)
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Zinc-plated fasteners with chromium (VI) free black zinc-nickel coating (ZNBHL) are suited for applications at great risk of corrosion. The coating consists of a layer of zinc-nickel alloy and an insulating coating (surface coating containing lubrication flakes).
Corrosion resistance:
- Diameter ≥ M2-360 h*
- Diameter ≥ M4-480 h*
- Diameter ≥ M10-720 h*
- *No base metal corrosion in threadless parts in salt-spray tests as per DIN EN ISO 9227 NSS.
Benefits:
- Up to 720 h corrosion resistance against base metal corrosion as per DIN EN ISO 9227-NSS
- Chromium (VI) free
- The surface coat with lubrication flakes has a friction coefficient range of 0.09-0.14 μ.
- Temperature resistance up to 120 °C
- Even surface coating distribution
- Functional, glossy surface
ISO 4762 replaces DIN 912 | There is some similarity | Nominal dimension ranges changed | Fine thread moved to standard ISO 12474.
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