DIN 6921 M8×40 Hex Flange Bolt21 combinations of material, property class and finish supplied in this size.
- Standard
- DIN 6921
- Thread
- M8 · pitch 1.25 mm
- Length under head
- 40 mm
- Drive
- 13 mm spanner · e 14.38 mm
- Head height
- 9.4 mm
- Clearance / tap drill
- 8.4 / 9 / 10 mm · 6.8 mm
- Weight
- 24.61 kg per 1 000 pieces · Theoretical, from nominal geometry — confirm before ordering40.6 pieces per kg
Supplied to DIN 6921 M8×40. ISO 4162 (s 10 mm against 13) at this size. Compared on the columns shown here only — product grade, tolerance class, length range, material and property-class references are set by each standard separately. We produce to whichever one your drawing calls out. Full comparison →
Order M8×40
Set a quantity on as many rows as you need. Not listed? We make to your drawing — send it with the enquiry.
These are not identical at M8×40 — the difference is shown against each standard above. Your choice is carried into the inquiry and the quotation.
| Material | Class | Finish | Quantity | Net weight |
|---|---|---|---|---|
| Carbon Steel | 4.8 | Zinc Plated | — | |
| Carbon Steel | 4.8 | Hot Dip Galvanized | — | |
| Carbon Steel | 4.8 | Dacromet | — | |
| Carbon Steel | 4.8 | Blackened | — | |
| Carbon Steel | 4.8 | Phosphate | — | |
| Carbon Steel | 4.8 | Plain | — | |
| Carbon Steel | 8.8 | Zinc Plated | — | |
| Carbon Steel | 8.8 | Hot Dip Galvanized | — | |
| Carbon Steel | 8.8 | Dacromet | — | |
| Carbon Steel | 8.8 | Blackened | — | |
| Carbon Steel | 8.8 | Phosphate | — | |
| Carbon Steel | 8.8 | Plain | — | |
| Alloy Steel | 10.9 | Zinc Plated | — | |
| Alloy Steel | 10.9 | Dacromet | — | |
| Alloy Steel | 10.9 | Blackened | — | |
| Alloy Steel | 10.9 | Phosphate | — | |
| Alloy Steel | 10.9 | Plain | — | |
| Stainless Steel | A2-70 | Plain | — | |
| Stainless Steel | A2-70 | Passivated | — | |
| Stainless Steel | A4-80 | Plain | — | |
| Stainless Steel | A4-80 | Passivated | — |
Dimensions at M8×40
| Dimension | Value |
|---|---|
| P | 1.25 mm |
| s | 13 mm |
| e | 14.38 mm |
| k | 9.4 mm |
| Weight | 24.61 kg / 1000 pcs |
| Pieces per kg | 40.6 |
Plating adds thickness — state the finish on the order.
Holes for this thread
ISO 273 · ISO 2306| Hole | Diameter |
|---|---|
| Clearance hole | 8.4 / 9 / 10 mm |
| Tap drill | 6.8 mm |
Other lengths in M8
All sizes →| Size | kg per 1 000 pieces | |
|---|---|---|
| M8×30 | 20.94 | open |
| M8×35 | 22.78 | open |
| M8×40 | 24.61 | this page |
| M8×45 | 26.45 | open |
| M8×50 | 28.28 | open |
