ISO 4032 is the standard companion nut to ISO 4014 and ISO 4017 hex bolts, covering hexagon nuts, Style 1 and superseding the legacy DIN 934 designation on most current international specifications. Jade Alloys produces hex nuts to ISO 4032 in carbon steel, alloy steel, and stainless steel. See our full fastener standards index for the matching bolt-side standards.
Current Norm & Equivalent Norms
- Current norm: DIN EN 24032
- Equivalent norms: DIN 934; CSN 021401; PN 82144; UNI 5588; EU 24032
ISO 4032 Nut Dimensions
Dimensions in millimeters. Small/preferred sizes M1.6-M12:
| Size | Pitch (P) | Width Across Flats (s) | Width Across Corners (e) min | Thickness (m) | da (min-max) |
|---|---|---|---|---|---|
| M1.6 | 0.35 | 3.02 – 3.20 | 3.41 | 1.05 – 1.30 | 1.60 – 1.84 |
| M2 | 0.4 | 3.82 – 4.00 | 4.32 | 1.35 – 1.60 | 2.00 – 2.30 |
| M2.5 | 0.45 | 4.82 – 5.00 | 5.45 | 1.75 – 2.00 | 2.50 – 2.90 |
| M3 | 0.5 | 5.32 – 5.50 | 6.01 | 2.15 – 2.40 | 3.00 – 3.45 |
| M4 | 0.7 | 6.78 – 7.00 | 7.66 | 2.90 – 3.20 | 4.00 – 4.60 |
| M5 | 0.8 | 7.78 – 8.00 | 8.79 | 4.40 – 4.70 | 4.70 – 5.75 |
| M6 | 1.0 | 9.78 – 10.00 | 11.05 | 4.90 – 5.20 | 6.00 – 6.75 |
| M8 | 1.25 | 12.73 – 13.00 | 14.38 | 6.44 – 6.80 | 8.00 – 8.75 |
| M10 | 1.5 | 15.73 – 16.00 | 17.77 | 8.04 – 8.40 | 10.00 – 10.80 |
| M12 | 1.75 | 17.73 – 18.00 | 20.03 | 10.37 – 10.80 | 10.37 – 13.00 |
Larger sizes M16-M64:
| Size | Pitch (P) | Width Across Flats (s) | Width Across Corners (e) min | Thickness (m) | da (min-max) |
|---|---|---|---|---|---|
| M16 | 2.0 | 23.67 – 24.00 | 26.75 | 14.10 – 14.80 | 16.00 – 17.30 |
| M18 | 2.5 | 26.16 – 27.00 | 29.56 | 15.10 – 15.80 | 18.00 – 19.50 |
| M20 | 2.5 | 29.16 – 30.00 | 32.95 | 16.90 – 18.00 | 20.00 – 21.60 |
| M22 | 2.5 | 33.00 – 34.00 | 37.29 | 18.10 – 19.40 | 22.00 – 23.70 |
| M24 | 3.0 | 35.00 – 36.00 | 39.55 | 20.20 – 21.50 | 24.00 – 25.90 |
| M27 | 3.0 | 40.00 – 41.00 | 45.20 | 22.50 – 23.80 | 27.00 – 29.10 |
| M30 | 3.5 | 45.00 – 46.00 | 50.85 | 24.30 – 25.60 | 30.00 – 32.40 |
| M33 | 3.5 | 49.00 – 50.00 | 55.37 | 27.40 – 28.70 | 33.00 – 35.60 |
| M36 | 4.0 | 53.80 – 55.00 | 60.79 | 29.40 – 31.00 | 36.00 – 38.90 |
| M39 | 4.0 | 58.80 – 60.00 | 66.44 | 31.80 – 33.40 | 39.00 – 42.10 |
| M42 | 4.5 | 63.10 – 65.00 | 71.30 | 32.40 – 34.00 | 42.00 – 45.40 |
| M45 | 4.5 | 68.10 – 70.00 | 76.95 | 34.40 – 36.00 | 45.00 – 48.60 |
| M48 | 5.0 | 73.10 – 75.00 | 82.60 | 36.40 – 38.00 | 48.00 – 51.80 |
| M52 | 5.0 | 78.10 – 80.00 | 88.25 | 40.40 – 42.00 | 52.00 – 56.20 |
| M56 | 5.5 | 82.80 – 85.00 | 93.56 | 43.40 – 45.00 | 56.00 – 60.50 |
| M60 | 5.5 | 87.80 – 90.00 | 99.21 | 46.40 – 48.00 | 60.00 – 64.80 |
| M64 | 6.0 | 92.80 – 95.00 | 104.86 | 49.10 – 51.00 | 64.00 – 69.10 |
Legend
- s – width across flats (size of the hexagon)
- e – width across corners
- m – height (thickness) of the nut
- d – nominal diameter of the thread
- da – diameter of the chamfer/washer face at the bearing surface
- dw – minimum bearing surface diameter
ISO 4032 Nut Weight Chart
Approximate weight in kilograms per 1,000 pieces:
| Size | Weight (kg/1,000 pcs) |
|---|---|
| M1.6 | 0.076 |
| M2 | 0.142 |
| M2.5 | 0.280 |
| M3 | 0.384 |
| M3.5 | 0.514 |
| M4 | 0.81 |
| M5 | 1.23 |
| M6 | 2.50 |
| M8 | 5.20 |
| M10 | 11.6 |
| M12 | 17.3 |
| M14 | 25.0 |
| M16 | 33.3 |
| M18 | 49.4 |
| M20 | 64.4 |
| M22 | 79 |
| M24 | 110 |
| M27 | 165 |
| M30 | 223 |
| M33 | 288 |
| M36 | 393 |
| M39 | 502 |
| M42 | 652 |
| M45 | 800 |
| M48 | 977 |
| M52 | 1220 |
| M56 | 1420 |
| M60 | 1690 |
| M64 | 1980 |
Weights are approximate reference values calculated from nominal ISO 4032 dimensions and standard carbon steel density; actual weight varies by material grade, tolerance, and coating. For a full calculation across any size and material, use our Metal Weight Calculator.
ISO 4032 Equivalent Standards
| Standard | Relationship |
|---|---|
| DIN 934 | Legacy German equivalent, effectively identical dimensions |
| ASME B18.2.2 | Inch-series hex nut equivalent (different dimensional system) |
| IS 1363-3 | Indian Standard equivalent for hexagon nuts |
| CSN 021401 | Czech Standard equivalent |
| PN 82144 | Polish Standard equivalent |
| UNI 5588 | Italian Standard equivalent |
| EU 24032 | Legacy EU-prefix numbering equivalent (predates full ISO harmonization) |
Material, Property Classes & Markings
ISO 4032 nuts are marked to identify material and property class:
- Steel: property classes 6, 8, 10, 12
- Stainless steel: A2, A4
- Plastic: PA (polyamide)
- Non-ferrous: brass, copper, aluminium
- Standard thread tolerance class: 6H
Property class must be matched to the mating bolt, see our DIN 933 and ISO 4014 pages for bolt property class detail.
Applications of ISO 4032 Nuts
ISO 4032 hex nuts are used wherever ISO 4014 or ISO 4017 hex bolts are specified general engineering, machinery assembly, structural connections, and piping support, particularly on export and internationally-specified projects.
Frequently Asked Questions
1. Is ISO 4032 the same as DIN 934?
2. What is the current norm for ISO 4032?
3. How do I match ISO 4032 nut property class to bolt property class?
4. What washer pairs with ISO 4032 nuts?
Sourcing ISO 4032 nuts to pair with a specific bolt grade or property class? Reach out to our technical team, or explore the full Fastener Standards hub.
