DIN 7991 Countersunk Socket Head Bolt
DIN 7991 countersunk socket head bolts tightened by hex key; ideal for flat, clean surfaces.
Product Description
DIN 7991 countersunk socket head bolts have a conical head that sits nearly flush with the surface after installation.
The head has an internal hex socket for tightening with a hex key. Threads follow DIN 7991, commonly fully threaded (depending on size/order).
Technical Drawing
Technical Specifications
| d | M3 | M4 | M5 | M6 | M8 | M10 | M12 |
|---|---|---|---|---|---|---|---|
| P | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 |
| dk | 6 | 8 | 10 | 12 | 16 | 20 | 24 |
| k | 1.7 | 2.3 | 2.8 | 3.3 | 4.4 | 5.5 | 6.5 |
| α | 90° | 90° | 90° | 90° | 90° | 90° | 90° |
| s | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 |
| d | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 |
|---|---|---|---|---|---|---|---|---|
| P | – | 2 | – | 2.5 | – | – | – | – |
| dk | – | 30 | – | 36 | – | – | – | – |
| k | – | 7.5 | – | 8.5 | – | – | – | – |
| α | – | 90° | – | 90° | – | – | – | – |
| s | – | 10 | – | 12 | – | – | – | – |
