UNI 5594
Dimensions of the stated UNI commercial selection. Design may vary with diameter; the illustration identifies the configuration and does not replace a manufacturing drawing.
UNI 5594
Low slotted castle nut
Castellated hexagon nut for retention by a split pin through a drilled bolt or pin. The low design reduces axial space requirements.
DIN 937
- Dimensional range
- M6–M48
- Thread
- Metric · coarse pitch
- Configuration
- Low slotted castle nut
- References
- DIN 937
Technical drawing and dimensional range
Coarse-pitch sizes are listed in the table. Fine-pitch designs are also available on request: specify diameter × pitch. Other sizes, materials and finishes are defined in the quotation.
Dimensions in mm. Identification drawing, not a manufacturing drawing.
| M | Pitch P | s | e min. | m | de | n |
|---|---|---|---|---|---|---|
| 6 | 1 | 10 | 11.05 | 6.5 | — | 2 |
| 8 | 1.25 | 13 | 14.38 | 8 | — | 2.5 |
| 10 | 1.5 | 17 | 18.9 | 10 | — | 2.8 |
| 12 | 1.75 | 19 | 21.1 | 12 | 17 | 3.5 |
| 14 | 2 | 22 | 24.49 | 13 | 19 | 3.5 |
| 16 | 2 | 24 | 26.75 | 14 | 22 | 4.5 |
| 18 | 2.5 | 27 | 30.14 | 15 | 25 | 4.5 |
| 20 | 2.5 | 30 | 33.53 | 15 | 28 | 4.5 |
| 22 | 2.5 | 32 | 35.72 | 18 | 30 | 5.5 |
| 24 | 3 | 36 | 39.98 | 18 | 34 | 5.5 |
| 27 | 3 | 41 | 45.63 | 20 | 38 | 5.5 |
| 30 | 3.5 | 46 | 51.28 | 21 | 42 | 7 |
| 33 | 3.5 | 50 | 55.8 | 23 | 46 | 7 |
| 36 | 4 | 55 | 61.31 | 23 | 50 | 7 |
| 39 | 4 | 60 | 66.96 | 25 | 55 | 7 |
| 42 | 4.5 | 65 | 72.61 | 28 | 58 | 9 |
| 45 | 4.5 | 70 | 78.26 | 30 | 62 | 9 |
| 48 | 5 | 75 | 83.91 | 30 | 65 | 9 |
The split pin prevents relative rotation after tightening; it does not generate preload. Check the pin hole, split pin and slot alignment against the assembly procedure. Bolt and split pin are not automatically included.
Materials and property classes
| Material | Class / hardness | Configurable range | Supply |
|---|---|---|---|
| Steel to mechanical specification | 8 | M6–M48 | 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 | 8 | M6–M48 |
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
DIN 937
Similar commercial reference: compare height, slots and supply specification. Exact dimensional equivalence is not claimed.
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
Requires a matching male thread and a correctly positioned split-pin hole.
The split pin prevents relative rotation after tightening; it does not generate preload. Check the pin hole, split pin and slot alignment against the assembly procedure. Bolt and split pin are not automatically included.
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.