Countersunk screw with hexagon socket head DIN 7991, steel 010.9, zinc-plated, black passivated (A2R)
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Countersunk screw with hexagon socket head DIN 7991, steel 010.9, zinc-plated, black passivated (A2R)
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Notice
DIN 7991 has been withdrawn and replaced by ISO 10642.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
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