Raised countersunk head screw with recessed head, H ISO 7047, steel 4.8, zinc-nickel, black (ZNBHL)
ISO 7047 steel 4.8 zinc nickel black
SCR-ISO7047-4.8-H2-(ZNBHL)-M4X20
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Connection elements with a galvanised chrome (VI)-free zinc-nickel coating (ZNBHL black or ZNSHL silver) are suitable for applications with a high risk of corrosion. The coating comprises a zinc-nickel alloy layer and a seal (top coat with integrated lubricating particles).
Overview of advantages:
- Corrosion resistance of up to 720 hrs to base metal corrosion in accordance with DIN EN ISO 9227 NSS
- Adjusted friction coefficient range from 0.09μ – 0.14μ due to top coat with integrated lubricating particles
- Thermal capacity up to 120 °C
- Even coat distribution
- Functional and decorative
ISO 7047 replaces DIN 966 | There is some limited similarity | Some head heights and head diameters have been changed | Thread lengths changed | Strength class 5.8 and 8.8 omitted | Recessed head penetration depths changed.
Datasheets(X)
 | |
Thread type x nominal diameter (d1) | M4 |
Length (l1) | 20 mm |
Head diameter (dk) | 8.4 mm |
Head height (k1) | 2.7 mm |
Standards | ISO 7047 |
Material | Steel |
Property class | 4.8 |
Surface | Zinc nickel black |
RoHS-compliant | Yes |
Head type | Raised countersunk head |
Drive type | Crosshead |
Internal drive | H2 |
Thread type | Metric thread |
Pitch | 0.7 mm |
Thread form | Standard metric thread |
Product class | A |
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