Countersunk head screws, ISO 10642 10.9, galvanised
Countersunk head screws, ISO 10642 10.9, galvanised, hexagon socket 2.5 M4 x 20
Hexagon socket countersunk head screws
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Hexagon socket countersunk head screws
Due to their head geometry, countersunk head screws have a limited load capacity according to this standard and possibly do not meet tensile or torsional strength requirements
The actual mechanical properties of the screw are unchanged and comply with ISO 3506-1
Depending on the type, these items are supplied with threading almost up to the head
Countersinks for screw heads in accordance with DIN 7991 and ISO 10642 must comply with DIN 74 shape F
Advice:
DIN 7991 has been withdrawn and replaced by ISO 10642. There is some limited similarity (Some head heights and head diameters changed | Nominal diameter M18, M22, M24 removed | Stainless steels removed | Strength classes 10.9 and 12.9 added)
Due to their head geometry, these screws can only be subjected to limited loads, see DIN EN ISO 898-1
Do not use the screw in applications with direct exposure to the weather or in wet rooms with atmospheres containing chlorine gas.
Datasheets(X)
 | |
Thread type x nominal diameter (d) | M4 |
Length (l) | 20 mm |
Thread length (metric thread) (b) | 16.12 mm |
Head height (k) | 2.48 mm |
Head diameter (dk) | 7.96 mm |
Width across flats (s) | 2.5 mm |
ISO | 10642 |
Material | Steel |
Property class | 10.9 |
Surface | Zinc plated |
Thread type | Metric thread |
Nominal diameter | 4 mm |
Pitch (p) | 0.7 mm |
Head type | Countersunk head |
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