DIN 7991 M4×40 Countersunk Socket Screw12 combinations of material, property class and finish supplied in this size.
- Standard
- DIN 7991 · 1986-01
- Thread
- M4 · pitch 0.7 mm
- Length under head
- 40 mm
- Head height
- 2.3 mm
- Clearance / tap drill
- 4.3 / 4.5 / 4.8 mm · 3.3 mm
- Weight
- 3.45 kg per 1 000 pieces · Theoretical, from nominal geometry — confirm before ordering290 pieces per kg
Supplied to DIN 7991 M4×40. ISO 10642 (dk 8.96 mm against 8) 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 M4×40
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 M4×40 — 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 | 8.8 | Plain | — | |
| Carbon Steel | 8.8 | Blackened | — | |
| Carbon Steel | 8.8 | Zinc Plated | — | |
| Alloy Steel | 10.9 | Plain | — | |
| Alloy Steel | 10.9 | Blackened | — | |
| Alloy Steel | 10.9 | Zinc Plated | — | |
| Alloy Steel | 12.9 | Plain | — | |
| Alloy Steel | 12.9 | Blackened | — | |
| Stainless Steel | A2-70 | Passivated | — | |
| Stainless Steel | A2-70 | Plain | — | |
| Stainless Steel | A4-80 | Passivated | — | |
| Stainless Steel | A4-80 | Plain | — |
Dimensions at M4×40
| Dimension | Value |
|---|---|
| P | 0.7 mm |
| k | 2.3 mm |
| Weight | 3.45 kg / 1000 pcs |
| Pieces per kg | 290 |
Plating adds thickness — state the finish on the order.
Holes for this thread
ISO 273 · ISO 2306| Hole | Diameter |
|---|---|
| Clearance hole | 4.3 / 4.5 / 4.8 mm |
| Tap drill | 3.3 mm |
