Hexagon socket countersunk head screw
One family data sheet with separate DIN and ISO dimensional executions, materials and finishes.
ISO 10642 / DIN 7991
- Type
- Countersunk head
- Drive
- Hexagon socket
- Thread
- Metric, coarse pitch in the tables
- Length L
- Overall, including head
Representative geometry photograph. Material and finish are specified separately.
Technical drawing
Not to scale. d: thread; L: overall length; dk: head diameter; k: head height; s: hexagon socket; t: minimum socket depth. The table identifies the DIN or ISO execution.
Reference geometry
Dimensions in mm. Supply lengths are not listed: specify the required length in your enquiry.
| Execution | d | dk | k | s | t min. |
|---|---|---|---|---|---|
| DIN 7991 | M3 | 6 | 1.7 | 2 | 0.95 |
| DIN 7991 | M4 | 8 | 2.3 | 2.5 | 1.55 |
| DIN 7991 | M5 | 10 | 2.8 | 3 | 2.05 |
| DIN 7991 | M6 | 12 | 3.3 | 4 | 2.25 |
| DIN 7991 | M8 | 16 | 4.4 | 5 | 3.2 |
| DIN 7991 | M10 | 20 | 5.5 | 6 | 4.1 |
| DIN 7991 | M12 | 24 | 6.5 | 8 | 4.3 |
| DIN 7991 | M14 | 27 | 7 | 10 | 4.5 |
| DIN 7991 | M16 | 30 | 7.5 | 10 | 5 |
| DIN 7991 | M18 | 33 | 8 | 12 | 5.2 |
| DIN 7991 | M20 | 36 | 8.5 | 12 | 5.6 |
| ISO 10642 | M6 | 13.44 | 3.72 | 4 | - |
| ISO 10642 | M8 | 17.92 | 4.96 | 5 | - |
| ISO 10642 | M10 | 22.4 | 6.2 | 6 | - |
| ISO 10642 | M12 | 26.88 | 7.44 | 8 | - |
DIN 7991 and ISO 10642 have different head dimensions. A dash indicates a dimension not given in the source table; verify it on the drawing.
Materials, grades, finishes and treatments
| Material | Grade | Finish | Execution |
|---|---|---|---|
| Steel | 8.8 | Uncoated; zinc plated; zinc flake; hot-dip galvanized | Specify standard and execution |
| Steel | 10.9 / 010.9 | Uncoated; clear, black or yellow zinc plated; zinc flake; hot-dip galvanized | Verify reduced loadability and marking |
| Stainless steel A2 | To specify | To specify | DIN 7991 / ISO 10642 |
| Stainless steel A4 | To specify | To specify; black oxide in documented executions | DIN 7991 / ISO 10642 |
| A5 / 1.4571 | To specify | To specify | ISO 10642 |
| D6 / 1.4462 Duplex | To specify | To specify | ISO 10642 |
| A8 / 1.4529 HCR | To specify | To specify | ISO 10642 |
| Nylon | Not applicable | Natural | Catalogue geometry referring to DIN 7991 |
Finishes are documented for individual catalogue executions; they do not form a matrix of automatically available combinations. Dueemme confirms material, standard, class and coating in the quotation.
Documentation
Download Dueemme data sheet ↓| Document | Status |
|---|---|
| Declaration of conformity | Subject to order agreement |
| Material certificate | Subject to order agreement |
| EN 10204 2.2 test report | Subject to order agreement |
| EN 10204 3.1 inspection certificate | Subject to order agreement |
| Dimensional inspection report | Subject to order agreement |
| Coating report | Subject to order agreement |
| Other documentation | Subject to order agreement |
Batch documents are not automatically included: specify your requirements in the RFQ.
Standards, types and application
The countersunk head requires a compatible seat. For the same thread, an ISO head may be wider or higher than the corresponding DIN head: check dk, k, socket depth and component countersink.
Reduced-loadability heads require the applicable marking and standard criteria. Material property class alone does not establish the breaking load of a full-loadability screw. Nylon has polymer-specific properties and limits.
Hexalobular TX versions are distinct drive geometries and must not be ordered as hexagon-socket screws.
Configure your enquiry
Select the diameter and enter the required length in the specifications, together with material, finish and quantity. Dueemme will confirm supply in its quotation.
The size you need, including custom specifications
Other diameters, lengths, materials and finishes can be assessed on request. For dedicated production, we agree geometry, requirements and minimum quantities with the customer.
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