DIN 603 M8 x 20 Carriage Bolt
In stock in 21 material, grade and finish combinations.
Dimensions at M8 x 20
mm · DIN 603 · dimensions from 2010-09 · current edition 2017-05| Dimension | Nominal | Min | Max | ISO 8677 | ISO 8678 | |
|---|---|---|---|---|---|---|
| d | Thread size | M8 | – | – | M8 | M8 |
| P | Thread pitch | 1.25 | – | – | 1.25 | 1.25 |
| Length | 20 | – | – | 20 | 20 | |
| ds | Body diameter | – | 7.42 | 8 | 8.58 | 8 |
| V | Square neck width | – | 7.42 | 8.58 | 7.42–8.58 | 7.85–8.58 |
| fn | Square neck height | – | 4.4 | 5.6 | 4.4–5.6 | 2.4–3 |
| dk | Head diameter | – | 19.35 | 20.65 | 18.7–20 | 18 |
| k | Head height | – | 4.12 | 4.88 | 4–4.8 | 4–4.8 |
| b | Thread length (length <= 125) | 22 | – | – | 22 | 22 |
| b | Thread length (125 < length <= 200) | 28 | – | – | 28 | — |
| b | Thread length (length > 200) | 41 | – | – | — | — |
- ISO 8677, ISO 8678
- Values in bold differ from DIN 603.
- Length under head
- 20 mm
- Approx. weight
- ≈ 6.37 kg per 1 000 pieces · Bare steel, before coating and packing.157 pieces per kg
- Also named
- ISO 8677
Holes for this thread
ISO 273 · ISO 2306Clearance hole · fine8.4 mm
Clearance hole · medium9 mm
Clearance hole · coarse10 mm
Tap drill6.8 mm
