25 SOCKET COUNTERSUNK HEAD SCREW ISO 10642 ZINC PLATED 08.8 M20X70 (DC)
Length (L) (mm)
All dimensions are guide values and may deviate dependent on the manufacturer.
Due to the unfavourable geometry of the head, these fasteners have reduced loadability.
When steel fasteners (e.g. 8.8 / 10.9 / 12.9) with reduced loadability need to be marked, the marking symbol for the property class is preceded by the digit '0'. So 8.8 → 08.8 and 10.9 → 010.9 and 12.9 → 012.9.
For the stainless steel fasteners it is indicated by marking the steel grade only and leaving out the property class 70 (e.g. A2-70 → A2).
The former and the latter indications can occur side by side for some time.
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