Hexalobular screw, cylindrical head
ISO 4762, TX, steel 8.8, zinc-nickel, black (ZNBHL)
ISO 4762 8.8 ZNBHL M8X25
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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.
Datasheets(X)
 | |
Thread type x nominal diameter (d) | M8 |
Length (l) | 25 mm |
Head diameter (d) | 13 mm |
Head height (k) | 8 mm |
Standards | ISO 4762 |
Material | Steel |
Property class | 8.8 |
Surface | Zinc nickel black |
RoHS-compliant | Yes |
Corrosion protection period | 480 h |
Head type | Socket head |
Drive type | Hexagon socket |
Internal drive (s) | HS6 |
Thread type | Metric thread |
Pitch | 1.25 mm |
Thread form | Standard metric thread |
Thread design | Partial thread |
Product class | A |
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