DIN 125 A
DIN 125 A is a historical reference used commercially for plain washers without chamfer. This is the 100 HV steel version; it is not presented as ISO 7089.
DIN 125 A
Commercial plain washer · 100 HV
A 100 HV steel plain washer without chamfer for use under a bolt head or nut. Select the size and finish in the commercial DIN 125 A series; ISO 7089 versions with 200/300 HV hardness have a separate data sheet.
ISO 7089 · UNI 6592
- Dimensional range
- M2–M60
- Series
- Normal · without chamfer
- Configuration
- 100 HV
- References
- ISO 7089 · UNI 6592
Technical drawing and dimensional range
Tabulated commercial series M2–M60. Nominal M identifies the bolt; bore, outside diameter and thickness are separate dimensions. Other dimensions on request.
Dimensions in mm. Identification drawing, not a manufacturing drawing.
| M | d1 | d2 | s |
|---|---|---|---|
| 2 | 2.2 | 5 | 0.3 |
| 2.5 | 2.7 | 6 | 0.5 |
| 3 | 3.2 | 7 | 0.5 |
| 4 | 4.3 | 9 | 0.8 |
| 5 | 5.3 | 10 | 1 |
| 6 | 6.4 | 12 | 1.6 |
| 8 | 8.4 | 16 | 1.6 |
| 10 | 10.5 | 20 | 2 |
| 12 | 13 | 24 | 2.5 |
| 14 | 15 | 28 | 2.5 |
| 16 | 17 | 30 | 3 |
| 18 | 19 | 34 | 3 |
| 20 | 21 | 37 | 3 |
| 22 | 23 | 39 | 3 |
| 24 | 25 | 44 | 4 |
| 27 | 28 | 50 | 4 |
| 30 | 31 | 56 | 4 |
| 33 | 34 | 60 | 5 |
| 36 | 37 | 66 | 5 |
| 39 | 40 | 72 | 6 |
| 42 | 43 | 78 | 7 |
| 45 | 46 | 85 | 7 |
| 48 | 50 | 92 | 8 |
| 52 | 54 | 98 | 8 |
| 56 | 58 | 105 | 9 |
| 60 | 62 | 110 | 9 |
The commercial version described here has 100 HV hardness. Bore and outside diameter follow catalogue dimensions; complete tolerances require confirmation against the supply specification. Similar geometry does not give the washer a 200 HV or 300 HV hardness class.
Materials and property classes
| Material | Class / hardness | Configurable range | Supply |
|---|---|---|---|
| Steel to mechanical specification | 100 HV | M2–M60 | On request |
Other materials and specifications on request
For requirements beyond the tabulated combinations, enquire about aluminium, brass, nylon, duplex, superduplex or an ASTM specification. Alloy or grade, dimensions, mechanical requirements and finish are defined for the enquiry; the geometric reference does not automatically imply conformity with the product standard.
Enquire about another material or ASTM specification
Finishes and treatments
| Finish | Material | Class / hardness | M |
|---|---|---|---|
| Plain / as manufactured | Steel to mechanical specification | 100 HV | M2–M60 |
| Electroplated zinc | Steel to mechanical specification | 100 HV | M2–M60 |
Select the finish for the material/property-class combination. Hydrogen relief and lubrication are separate process requirements, not certificates and not implied by the coating name.
ISO, DIN and UNI: key differences
ISO 7089:2000
Related reference with distinct hardness requirements: ISO 7089 specifies 200 HV/300 HV. Do not confuse the commercial 100 HV version with ISO conformity.
UNI 6592
Related commercial reference for plain washers. Verify the requested specification and dimensions without claiming exact normative equivalence.
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.
Mating components
Check bore size, bearing surface, hardness and materials throughout the connection.
100 HV washers are also used commercially with class 8.8 bolts and class 8 nuts. This is not a universal design rule: verify bearing pressure, support material and joint requirements.
Application sectors
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.
Send your specification →Configure your enquiry
Selections follow the technical combinations in this data sheet. Quantities, delivery terms and documents will be agreed in the quotation.