Metric Nut Dimensions Chart
according to ISO 4032
| Thread Pitch |
F | E | T | |||
| Width Across Flats |
Width Across Corners |
Height of the Nut |
||||
| Nut Size | max. | min. | min. | max. | min. | |
| M1.6 | 0.35 | 3.20 | 3.02 | 3.41 | 1.30 | 1.05 |
| M2 | 0.4 | 4.00 | 3.82 | 4.32 | 1.60 | 1.35 |
| M2.5 | 0.45 | 5.00 | 4.82 | 5.45 | 2.00 | 1.75 |
| M3 | 0.5 | 5.50 | 5.32 | 6.01 | 2.40 | 2.15 |
| M3.5* | 0.6 | 6.00 | 5.82 | 6.58 | 2.80 | 2.55 |
| M4 | 0.7 | 7.00 | 6.78 | 7.66 | 3.2 | 2.9 |
| M5 | 0.8 | 8.00 | 7.78 | 8.79 | 4.7 | 4.4 |
| M6 | 1 | 10.00 | 9.78 | 11.05 | 5.2 | 4.9 |
| M8 | 1.25 | 13.00 | 12.73 | 14.38 | 6.80 | 6.44 |
| M10 | 1.5 | 16.00 | 15.73 | 17.77 | 8.40 | 8.04 |
| M12 | 1.75 | 18.00 | 17.73 | 20.03 | 10.80 | 10.37 |
| M14* | 2 | 21.00 | 20.67 | 23.36 | 12.8 | 12.1 |
| M16 | 2 | 24.00 | 23.67 | 26.75 | 14.8 | 14.1 |
| M18* | 2.5 | 27.00 | 26.16 | 29.56 | 15.8 | 15.1 |
| M20 | 2.5 | 30.00 | 29.16 | 32.95 | 18.0 | 16.9 |
| M22* | 2.5 | 34 | 33 | 37.29 | 19.4 | 18.1 |
| M24 | 3 | 36 | 35 | 39.55 | 21.5 | 20.2 |
| M27* | 3 | 41 | 40 | 45.2 | 23.8 | 22.5 |
| M30 | 3.5 | 46 | 45 | 50.85 | 25.6 | 24.3 |
| M33* | 3.5 | 50 | 49 | 55.37 | 28.7 | 27.4 |
| M36 | 4 | 55.0 | 53.8 | 60.79 | 31.0 | 29.4 |
| M39* | 4 | 60.0 | 58.8 | 66.44 | 33.4 | 31.8 |
| M42 | 4.5 | 65.0 | 63.1 | 71.3 | 34.0 | 32.4 |
| M45* | 4.5 | 70.0 | 68.1 | 76.95 | 36.0 | 34.4 |
| M48 | 5 | 75.0 | 73.1 | 82.6 | 38.0 | 36.4 |
| M52* | 5 | 80.0 | 78.1 | 88.25 | 42.0 | 40.4 |
| M56 | 5.5 | 85.0 | 82.8 | 93.56 | 45.0 | 43.4 |
| M60* | 5.5 | 90.0 | 87.8 | 99.21 | 48.0 | 46.4 |
| M64 | 6 | 95.0 | 92.8 | 104.86 | 51.0 | 49.1 |
Note.. All dimensions are given in millimeters.
* Non-preferred threads according to standard.
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