Countersunk screw with hexagon socket head DIN 7991, steel 010.9, zinc-plated, blue passivated (A2K)
DIN 7991 steel 010.9 steel zinc plated
SCR-CS-DIN7991-010.9-(A2K)-HS2,5-M4X20
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Countersinking angle for M3-M20 90° and for M22 and M24 60°
Manufactured in accordance with DIN 7991. DIN 7991 has been withdrawn and replaced by ISO 10642. There is some limited similarity. (Head height and head diameter partly changed | nominal diameter M18, M22, M24). For new designs, it is recommended to use the more common ISO version.
Due to their head geometry, these screws can only be subjected to limited loads, see DIN EN ISO 898-1
Datasheets(X)
Thread type x nominal diameter (d1) | M4 |
Length (l1) | 20 mm |
Head diameter (dk) | 8 mm |
Head height (k1) | 2.3 mm |
Internal drive (s1) | HS2.5 |
Standards | DIN 7991 |
Material | Steel |
Property class | 010.9 |
Surface | Zinc plated |
RoHS-compliant | Yes |
Head type | Countersunk head |
Drive type | Hexagon socket |
Thread type | Metric thread |
Thread form | Standard metric thread |
Product class | A |
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