ISO 4032:2023
Main standard used for the dimensions in this data sheet.
ISO 4032 · 2023
Hexagon regular nut, style 1
Regular hexagon nut with a coarse metric thread. Select the nut material and property class to suit the joint and its mating bolt.
DIN 934 · UNI 5588
- Dimensional range
- M5–M39
- Thread
- Metric · coarse pitch
- Configuration
- Regular nut, style 1
- References
- DIN 934 · UNI 5588
Technical drawing and dimensional range
ISO 4032:2023 dimensional range M5–M39. Material and property-class diameter limits also apply to the enquiry.
Dimensions in mm. Identification drawing, not a manufacturing drawing.
| M | Pitch P | s | m min. | m max. |
|---|---|---|---|---|
| 5 | 0.8 | 8 | 4.4 | 4.7 |
| 6 | 1 | 10 | 4.9 | 5.2 |
| 7 | 1 | 11 | 6.14 | 6.5 |
| 8 | 1.25 | 13 | 6.44 | 6.8 |
| 10 | 1.5 | 16 | 8.04 | 8.4 |
| 12 | 1.75 | 18 | 10.37 | 10.8 |
| 14 | 2 | 21 | 12.1 | 12.8 |
| 16 | 2 | 24 | 14.1 | 14.8 |
| 18 | 2.5 | 27 | 15.1 | 15.8 |
| 20 | 2.5 | 30 | 16.9 | 18 |
| 22 | 2.5 | 34 | 18.1 | 19.4 |
| 24 | 3 | 36 | 20.2 | 21.5 |
| 27 | 3 | 41 | 22.5 | 23.8 |
| 30 | 3.5 | 46 | 24.3 | 25.6 |
| 33 | 3.5 | 50 | 27.4 | 28.7 |
| 36 | 4 | 55 | 29.4 | 31 |
| 39 | 4 | 60 | 31.8 | 33.4 |
Classes 8, 10 and 12 are nut property classes, not bolt classes. ISO 4032:2023 limits class 12 to M5–M16 and A4-80 to M5–M24. Do not extend class 80 automatically beyond M24. Fine threads require a separate standard reference. For M24 < D ≤ M39, A2-50 and A4-50 are also specified alongside A2-70 and A4-70; these class-50 combinations are not automatically extended to smaller diameters.
Materials and property classes
| Material | Class / hardness | Configurable range | Supply |
|---|---|---|---|
| Steel to mechanical specification | 8 | M5–M39 | On request |
| Steel to mechanical specification | 10 | M5–M39 | On request |
| Steel to mechanical specification | 12 | M5–M16 | On request |
| A2 stainless steel | 70 | M5–M39 | On request |
| A4 stainless steel | 70 | M5–M39 | On request |
| A4 stainless steel | 80 | M5–M24 | On request |
| A2 stainless steel | 50 | M27–M39 | On request |
| A4 stainless steel | 50 | M27–M39 | 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 | M5–M39 |
| Plain / as manufactured | Steel to mechanical specification | 10 | M5–M39 |
| Plain / as manufactured | Steel to mechanical specification | 12 | M5–M16 |
| Electroplated zinc | Steel to mechanical specification | 8 | M5–M39 |
| Zinc flake | Steel to mechanical specification | 10 | M6–M30 |
| Plain / as manufactured | A2 stainless steel | 70 | M5–M39 |
| Plain / as manufactured | A4 stainless steel | 70 | M5–M39 |
| Plain / as manufactured | A4 stainless steel | 80 | M5–M24 |
| Plain / as manufactured | A2 stainless steel | 50 | M27–M39 |
| Plain / as manufactured | A4 stainless steel | 50 | M27–M39 |
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 934:1987
Withdrawn standard. At M12: DIN width across flats 19 and nominal height 10 mm; ISO width 18 and maximum height 10.8 mm. Check space requirements before substitution.
UNI 5588:1965
Withdrawn without replacement on 31 March 1995. Historical hexagon-nut reference; check dimensions against the current ISO edition.
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.
Commercial practice also includes class 8.8 bolts, class 8 nuts and 100 HV washers supplied to DIN 125 A / UNI 6592 references. Suitability must be checked against the joint conditions. For ISO 7089 washers, the reference hardness is 200 HV for bolts up to class 8.8 and nuts up to class 8, and 300 HV for bolts up to class 10.9 and nuts up to class 10. Commercial practice and standard requirements remain distinct.
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.