DIN 985
Dimensions refer to the stated DIN selection. Related ISO/UNI references are not automatic equivalents: check pitch and envelope against the required specification.
DIN 985
Low nylon-insert lock nut
A nylon insert retained in the upper collar provides prevailing torque during assembly. Coarse- and fine-pitch designs are listed in the table: always specify diameter × pitch.
UNI 7474 · ISO 10511
Commercial class 04 with reduced loadability; do not automatically assign class 8 performance. Non-metallic insert: check temperature, chemicals and coating compatibility. Prevailing torque is not preload. Reuse and acceptance criteria must follow the manufacturer specification; no universal reuse count is assigned.
- Dimensional range
- M5–M48
- Thread
- Metric · coarse pitch
- Configuration
- Low nylon-insert lock nut
- References
- UNI 7474 · ISO 10511
Technical drawing and dimensional range
Reference sizes are listed in the table. Other diameters, pitches, materials and finishes are available on request, subject to an agreed supply specification.
Dimensions in mm. Identification drawing, not a manufacturing drawing.
| M | Pitch P | s | h | m |
|---|---|---|---|---|
| 5 | 0.8 | 8 | 5 | 3.5 |
| 6 | 1 | 10 | 6 | 4.5 |
| 8 | 1.25 | 13 | 8 | 6.5 |
| 8 | 1 | 13 | 8 | 6.5 |
| 10 | 1.5 | 17 | 10 | 8 |
| 10 | 1.25 | 17 | 10 | 8 |
| 12 | 1.75 | 19 | 12 | 10 |
| 12 | 1.25 | 19 | 12 | 10 |
| 14 | 2 | 22 | 14 | 11 |
| 14 | 1.5 | 22 | 14 | 11 |
| 16 | 2 | 24 | 16 | 12.8 |
| 16 | 1.5 | 24 | 16 | 12.8 |
| 18 | 1.5 | 27 | 18.5 | 14.4 |
| 20 | 1.5 | 30 | 20 | 16 |
| 22 | 1.5 | 32 | 22 | 17.6 |
| 24 | 2 | 36 | 24 | 19 |
| 27 | 2 | 41 | 27 | 21.6 |
| 30 | 2 | 46 | 30 | 24 |
| 33 | 2 | 50 | 33 | 24 |
| 36 | 3 | 55 | 36 | 28 |
| 39 | 3 | 60 | 39 | 31 |
| 42 | 3 | 65 | 42 | 33 |
| 45 | 3 | 70 | 45 | 36 |
| 48 | 3 | 75 | 48 | 38 |
Commercial class 04 with reduced loadability; do not automatically assign class 8 performance. Non-metallic insert: check temperature, chemicals and coating compatibility. Prevailing torque is not preload. Reuse and acceptance criteria must follow the manufacturer specification; no universal reuse count is assigned.
Materials and property classes
| Material | Class / hardness | Configurable range | Supply |
|---|---|---|---|
| Steel to mechanical specification | 04 | M5–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 |
|---|---|---|---|
| Electroplated zinc | Steel to mechanical specification | 04 | M5–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
UNI 7474
Related reference; compare dimensions, design and mechanical specification before substitution. Exact equivalence is not claimed.
ISO 10511
Related coarse-pitch reference; not assigned to the fine-pitch rows of this sheet.
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 bolt and nut diameter and pitch. Links to other families do not declare compatibility of every thread.
Non-metallic insert: check temperature, chemicals and coating compatibility. Prevailing torque is not preload. Reuse and acceptance criteria must follow the manufacturer specification; no universal reuse count is assigned.
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.