DIN 7991 M20×50 Countersunk Socket Screw12 combinations of material, property class and finish supplied in this size.
- Standard
- DIN 7991 · 1986-01
- Thread
- M20 · pitch 2.5 mm
- Length under head
- 50 mm
- Head height
- 8.5 mm
- Clearance / tap drill
- 21 / 22 / 24 mm · 17.5 mm
- Weight
- 128.61 kg per 1 000 pieces · Theoretical, from nominal geometry — confirm before ordering7.8 pieces per kg
Supplied to DIN 7991 M20×50. ISO 10642 (dk 40.32 mm against 36) 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 M20×50
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 M20×50 — 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 M20×50
| Dimension | Value |
|---|---|
| P | 2.5 mm |
| k | 8.5 mm |
| Weight | 128.61 kg / 1000 pcs |
| Pieces per kg | 7.8 |
Plating adds thickness — state the finish on the order.
Holes for this thread
ISO 273 · ISO 2306| Hole | Diameter |
|---|---|
| Clearance hole | 21 / 22 / 24 mm |
| Tap drill | 17.5 mm |
Other lengths in M20
All sizes →| Size | kg per 1 000 pieces | |
|---|---|---|
| M20×30 | 86.97 | open |
| M20×35 | 97.38 | open |
| M20×40 | 107.79 | open |
| M20×45 | 118.20 | open |
| M20×50 | 128.61 | this page |
