DIN 7991
Hexagon Socket Countersunk Screws
Equivalent Standard: ISO 10642 | UNI 5933
Metric DIN 7991 hexagon socket cap screws have a flat countersunk head with an internal hexagonal drive suited for a hex / Allen key or wrench. The internal drive is ideal for situations where externally wrenched screws are impractical such as in applications where limited space is available. Furthermore the flat countersunk head allows for the head to lie flush with the surface of the substrate. BRK Industries offers an extensive range of metric DIN 7991 hexagon socket cap screws as well other inch and metric industrial fasteners for immediate delivery from stock. The following sizes of metric DIN 7991 hexagon socket cap screws are available for immediate shipping from stock: Diameters ranging from M3 to M24 in lengths up to 150mm, in steel and stainless steel A2 and A4. View parts by clicking on the following link: Flat Countersunk Head Hexagon Socket Cap Screw DIN 7991.
- DIN 7991 Hexagon Socket Countersunk Screws
- Material Grade: 8.8, 10.9
- Finish: Self, Black, Bright Zinc, Hot Dip Galvanized
- Thread: METRIC
Technical Specification for DIN 7991 Hexagon Socket Countersunk Screws
| Nom. Dia. (d) | M6 | M8 | M10 | M12 | M16 | M20 | |
| Thread Pitch | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | |
| Thread Length (b) | 18 | 22 | 26 | 30 | 38 | 46 | |
| dk | Max. | 12 | 16 | 20 | 24 | 30 | 36 |
| K | Max. | 3.3 | 4.4 | 5.5 | 6.5 | 7.5 | 8.5 |
| α | 90° | 90° | 90° | 90° | 90° | 90° | |
| s | Nominal | 4 | 5 | 6 | 8 | 10 | 12 |
| L | WEIGHT IN KG/1000 PCS | ||||||
| 10 | 2.70 | 5.47 | |||||
| 12 | 3.05 | 6.10 | 10.10 | ||||
| 16 | 3.76 | 7.35 | 12.10 | ||||
| 20 | 4.46 | 7.60 | 14.10 | 21.20 | |||
| 25 | 5.34 | 10.20 | 16.60 | 24.80 | |||
| 30 | 6.22 | 11.70 | 19.10 | 28.50 | 51.80 | ||
| 35 | 7.10 | 13.30 | 21.60 | 32.10 | 58.40 | 91.40 | |
| 40 | 8.83 | 14.80 | 24.10 | 35.70 | 65.10 | 102.00 | |
| 50 | 11.00 | 19.90 | 30.10 | 43.00 | 78.40 | 123.00 | |
| 60 | 24.80 | 35.70 | 54.00 | 91.70 | 143.00 | ||
| 70 | 41.20 | 62.90 | 111.00 | 164.00 | |||
| 80 | 127.00 | 200.00 | |||||
| 90 | 143.00 | 226.00 | |||||
| 100 | 253.00 | ||||||
