DIN 7349
DIN 7349 identifies a specific washer geometry for heavy-duty spring-pin assemblies. DIN 125 A and DIN 9021 have different geometries and are not automatic equivalents.
DIN 7349
Heavy-section plain washer
A heavy-section washer for assemblies using heavy-duty spring pins and applications requiring a specific bearing geometry. Select bore, outside diameter and thickness together; this is not a direct substitute for a normal plain washer.
- Dimensional range
- M3–M30
- Series
- Plain · heavy section
- Configuration
- A2 / A4 stainless
Technical drawing and dimensional range
15 commercial sizes M3–M30. Pin Ø is the catalogue dimensional reference for the heavy-duty spring-pin assembly, not the bolt diameter. Other sizes and dedicated production on request.
Dimensions in mm. Identification drawing, not a manufacturing drawing.
| M | d1 | d2 | s | Pin Ø | kg / 1,000 pcs |
|---|---|---|---|---|---|
| 3 | 3.2 | 9 | 1 | 6 | ND |
| 4 | 4.3 | 12 | 1.6 | 8 | ND |
| 5 | 5.3 | 15 | 2 | 10 | ND |
| 6 | 6.4 | 17 | 3 | 12 | ND |
| 8 | 8.4 | 21 | 4 | 16 | ND |
| 10 | 10.5 | 25 | 4 | 18 | ND |
| 12 | 13 | 30 | 6 | 21 | ND |
| 14 | 15 | 36 | 6 | 25 | ND |
| 16 | 17 | 40 | 6 | 28 | ND |
| 18 | 19 | 44 | 8 | 32 | ND |
| 20 | 21 | 44 | 8 | 35 | ND |
| 22 | 23 | 50 | 8 | 38 | ND |
| 24 | 25 | 50 | 10 | 40 | ND |
| 27 | 28 | 60 | 10 | 45 | ND |
| 30 | 31 | 68 | 10 | 50 | ND |
ND: weight per 1,000 pieces has not been verified for this stainless series. Weights for steel versions or different dimensions are not automatically transferred.
A2 and A4 identify the stainless steel group. This selection does not assign a 70/80 property class or an HV hardness not declared for the variant. Tolerances and mechanical requirements are defined in the supply specification.
Materials and property classes
| Material | Class / hardness | Configurable range | Supply |
|---|---|---|---|
| A2 stainless steel | To be specified | M3–M30 | On request |
| A4 stainless steel | To be specified | M3–M30 | On request |
Other materials and specifications on request
Steel versions with specified hardness and finish, as well as custom washers, can be assessed. For substantial quantities we can review dedicated dimensions and geometries, agreeing requirements and minimum batch size.
Enquire about another material or ASTM specification
Finishes and treatments
| Finish | Material | Class / hardness | M |
|---|---|---|---|
| Plain / as manufactured | A2 stainless steel | To be specified | M3–M30 |
| Plain / as manufactured | A4 stainless steel | To be specified | M3–M30 |
Stainless versions without an additionally declared coating. Specify passivation, electropolishing or dedicated surface requirements in the enquiry.
ISO, DIN and UNI: key differences
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
Related washers are geometric alternatives to compare, not directly interchangeable replacements.
Check loading, bearing surface and assembly compatibility. Greater thickness alone does not establish a certified load capacity or structural suitability.
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.