DIN 557
DIN 557 identifies the chamfered commercial geometry. Dimensions and combinations support product selection; specify supply conformity, property class and tolerances in the order.
DIN 557
Chamfered square nut
Four flat sides allow tool engagement or location in a pocket that prevents rotation. Select the chamfered square nut by thread, height and the space available in its housing.
UNI 5597
- Dimensional range
- M5–M16
- Thread
- Metric · coarse pitch
- Configuration
- Square · chamfered
- References
- UNI 5597
Technical drawing and dimensional range
Verified commercial sizes M5, M6, M8, M10, M12 and M16. Other sizes, heights and threads on request. Width s is measured between parallel faces, not across the diagonal.
Dimensions in mm. Identification drawing, not a manufacturing drawing.
| M | Pitch P | s | m |
|---|---|---|---|
| 5 | 0.8 | 8 | 4 |
| 6 | 1 | 10 | 5 |
| 8 | 1.25 | 13 | 6.5 |
| 10 | 1.5 | 17 | 8 |
| 12 | 1.75 | 19 | 10 |
| 16 | 2 | 24 | 13 |
Dimensions s and m are commercial selection references. Allow clearance and tolerances in the housing; the square shape does not make the nut self-locking. The listed class identifies the requested commercial version, not every supply in the DIN 557 family.
Materials and property classes
| Material | Class / hardness | Configurable range | Supply |
|---|---|---|---|
| Steel to mechanical specification | 6 | M5–M16 | On request |
Other materials and specifications on request
Aluminium →Brass →Nylon →Duplex →Superduplex →ASTM — specification and grade →Other class / A2 or A4 stainless →
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 | 6 | M5–M16 |
| Electroplated zinc | Steel to mechanical specification | 6 | M5–M16 |
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
UNI 5597
Related reference in commercial catalogues. No exact normative equivalence is claimed; compare geometry and the supply specification.
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
Match nominal diameter, pitch, strength, material, finish and joint conditions.
Joint strength depends on nut class, mating bolt and effective thread engagement. Do not automatically transfer class 8 hexagon-nut pairing rules to this commercial class 6 version.
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.