ISO 7047 M8 x 20 Raised Countersunk Head Screw
In stock in 5 material, grade and finish combinations.
Dimensions at M8 x 20
mm · ISO 7047 · 2011 edition| Dimension | Nominal | Min | Max | |
|---|---|---|---|---|
| d | Thread size | M8 | – | – |
| P | Thread pitch | 1.25 | – | – |
| l | Length | 20 | – | – |
| a | Thread runout | – | – | 2.5 |
| dk | Theoretical head diameter | 15.8 | 15.37 | 17.3 |
| f | Raised head height (ref) | 2 | – | – |
| k | Head height | 4.65 | – | – |
| r | Radius | – | – | 2 |
| rf | Head radius (ref) | 16.5 | – | – |
| x | Incomplete thread | – | – | 3.2 |
| Recess number | 3 | – | – | |
| m | Type H recess width (ref) | 9.6 | – | – |
| Type H penetration | – | 4.75 | 5.25 | |
| m | Type Z / socket width (ref) | 9.5 | – | – |
| Type Z penetration | – | 4.75 | 5.2 | |
| b | Thread length | 38 | – | – |
- Length to top of countersink
- 20 mm · 19.58–20.42 mm to ISO 7047 product grade A
- Approx. weight
- ≈ 10.10 kg per 1 000 pieces · Bare steel, before coating and packing.99.0 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
