Taper pin with internal thread, form A
Locating and connecting component. Geometry and tolerances are separate from materials and treatments; specify the required length in your quotation request.
DIN 7978 A / ISO 8736 A / ex UNI 7284
- References
- DIN 7978 A / ISO 8736 A / ex UNI 7284
- Tolerance / check
- h10
- Execution
- See drawing and technical notes
- Units
- mm
Representative geometry photograph. Material and finish are specified separately.
Technical drawing
- d1
- Nominal diameter at the small end, h10.
- a
- End chamfer.
- 1:50
- Pin taper.
- d2
- Extraction thread.
- t1
- Threaded-hole depth.
- l / L
- Required length, to specify in the enquiry.
Reference drawing by Gandini. Dimensions in mm; not to scale. L identifies the length to specify in the quotation.
Reference geometry
Dimensions in mm. Supply lengths are not listed: specify the required length in your enquiry.
| d | Tolerance d | a max | d2 | t1 |
|---|---|---|---|---|
| 4,0 | h10 | - | - | - |
| 5,0 | h10 | - | - | - |
| 6,0 | h10 | 0,80 | M4 | 6 |
| 8,0 | h10 | 1,00 | M5 | 8 |
| 10,0 | h10 | 1,20 | M6 | 10 |
| 12,0 | h10 | 1,60 | M8 | 12 |
| 13,0 | h10 | 1,60 | M8 | 12 |
| 14,0 | h10 | 1,60 | M8 | 12 |
| 16,0 | h10 | 2,00 | M10 | 16 |
| 20,0 | h10 | 2,50 | M12 | 18 |
| 25,0 | h10 | 3,00 | M16 | 24 |
The data identifies geometry, not availability. Diameter tolerance is distinct from length tolerance. A dash denotes an undocumented source dimension requiring verification on the supply drawing.
Materials, grades, finishes and treatments
| Material | Condition / requirements | Machining / finish |
|---|---|---|
| Free-cutting or carbon steel | Unhardened | Ground |
Materials and executions documented by the sources; specify them in your enquiry. Not all combinations are implied. Dueemme confirms grade, treatment, mechanical properties and availability in the quotation. A1/A2/A4 labels do not replace the metallurgical specification of the pin.
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.
Tolerances, standards and installation
Taper 1:50. The h10 tolerance refers to the nominal small-end diameter; the large-end diameter depends on taper geometry and the requested length. The mating tapered hole must match the drawing.
Related ISO/UNI references do not establish automatic equivalence: confirm the governing standard, edition and supply drawing.
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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