DIN 7991 M8 x 20 Countersunk Socket Screw
In stock in 18 material, grade and finish combinations.
Dimensions at M8 x 20
mm · DIN 7991 · 1986-01 · withdrawn| Dimension | Nominal | Min | Max | ISO 10642 | |
|---|---|---|---|---|---|
| d | Thread size | M8 | – | – | M8 |
| P | Thread pitch | 1.25 | – | – | 1.25 |
| l | Length | 20 | – | – | 20 |
| s | Hex socket size | 5 | – | – | 5 |
| dk | Head diameter | 16 | – | – | 15.24 |
| k | Head height | 4.4 | – | – | 4.96 |
- ISO 10642
- Values in bold differ from DIN 7991.
- Length incl. head
- 20 mm · 19.58–20.42 mm to DIN 7991 product grade A
- Approx. weight
- ≈ 9.02 kg per 1 000 pieces · Bare steel, before coating and packing.111 pieces per kg
Holes for this thread
ISO 273 · ISO 2306Clearance hole · fine8.4 mm
Clearance hole · medium9 mm
Clearance hole · coarse10 mm
Tap drill6.8 mm
