DINReplaced → ISO 4035Draft · single source
DIN 439 B
Hexagon thin nuts — Form B — chamfered
- Head · drive
- External hexagon (spanner)
- Thread
- Metric ISO coarse thread
- Tolerance
- 6H
- Property classes
- 04A2A4
- Materials
- SteelStainlessBrass
Replaced by
ISO 4035Current · Draft
Not identical: the width across flats differs for M10 (DIN 17 → ISO 16 mm), M12 (19 → 18 mm), M14 (22 → 21 mm) and M22 (32 → 34 mm); other sizes are unchanged. Other dimensions (e.g. head or nut height) can also differ.
What changed · s
| Size | DIN 439 B | ISO 4035 | Δ |
|---|---|---|---|
| M10 | 17 | 16 | −1 |
| M12 | 19 | 18 | −1 |
| M14 | 22 | 21 | −1 |
| M22 | 32 | 34 | +2 |
Source: Würth DIN→ISO changeover list · mm
Dimensions
mm · values as the standard states them| Size | P | s | e | m | dw | da | m´ | thread_alt |
|---|---|---|---|---|---|---|---|---|
| M1.6 | 0.35 | 3.08 – 3.2 | ≥ 3.48 | 0.75 – 1 | ≥ 2.4 | 1.6 – 1.84 | ≥ 0.6 | — |
| (M1.8) | 0.35 | 3.38 – 3.5 | ≥ 3.82 | 0.85 – 1.1 | ≥ 2.7 | 1.8 – 2.06 | ≥ 0.68 | — |
| M2 | 0.4 | 3.82 – 4 | ≥ 4.32 | 0.95 – 1.2 | ≥ 3.1 | 2 – 2.3 | ≥ 0.76 | — |
| M2.5 | 0.45 | 4.82 – 5 | ≥ 5.45 | 1.35 – 1.6 | ≥ 4.1 | 2.5 – 2.9 | ≥ 1.06 | — |
| M3 | 0.5 | 5.32 – 5.5 | ≥ 6.01 | 1.55 – 1.8 | ≥ 4.6 | 3 – 3.45 | ≥ 1.24 | — |
| (M3.5) | 0.6 | 5.82 – 6 | ≥ 6.58 | 1.75 – 2 | ≥ 5.1 | 3.5 – 4 | ≥ 1.4 | — |
| M4 | 0.7 | 6.78 – 7 | ≥ 7.66 | 1.95 – 2.2 | ≥ 5.9 | 4 – 4.6 | ≥ 1.56 | — |
| M5 | 0.8 | 7.78 – 8 | ≥ 9.79 | 2.45 – 2.7 | ≥ 6.9 | 5 – 5.75 | ≥ 1.96 | — |
| M6 | 1 | 9.78 – 10 | ≥ 11.05 | 2.9 – 3.2 | ≥ 8.9 | 6 – 6.75 | ≥ 2.32 | — |
| M8 | 1.25 | 12.73 – 13 | ≥ 14.38 | 3.7 – 4 | ≥ 11.6 | 8 – 8.75 | ≥ 2.96 | M8x1 |
| M10 | 1.5 | 16.73 – 17 | ≥ 18.9 | 4.7 – 5 | ≥ 15.6 | 10 – 10.8 | ≥ 3.76 | M10x1,25 |
| M12 | 1.75 | 18.67 – 19 | ≥ 21.1 | 5.7 – 6 | ≥ 17.4 | 12 – 13 | ≥ 4.56 | M12x1,25 |
| (M14) | 2 | 21.67 – 22 | ≥ 24.49 | 6.42 – 7 | ≥ 20.5 | 14 – 15.1 | ≥ 5.14 | (M14x1,5) |
| M16 | 2 | 23.67 – 24 | ≥ 26.75 | 7.42 – 8 | ≥ 22.5 | 16 – 17.3 | ≥ 5.94 | M16x1,5 |
| (M18) | 2.5 | 26.16 – 27 | ≥ 29.56 | 8.42 – 9 | ≥ 24.9 | 18 – 19.5 | ≥ 6.74 | (M18x2) |
| M20 | 2.5 | 29.16 – 30 | ≥ 32.95 | 9.1 – 10 | ≥ 27.7 | 20 – 21.6 | ≥ 7.28 | M20x1,5 |
| (M22) | 2.5 | 31 – 32 | ≥ 35.03 | 9.9 – 11 | ≥ 29.5 | 22 – 23.8 | ≥ 7.92 | (M22x2) |
| M24 | 3 | 35 – 36 | ≥ 39.55 | 10.9 – 12 | ≥ 33.2 | 24 – 25.9 | ≥ 8.72 | (M24x1,5) |
| (M27) | 3 | 40 – 41 | ≥ 45.2 | 12.4 – 13.5 | ≥ 38 | 27 – 29.2 | ≥ 9.9 | (M27x1,5) |
| M30 | 3.5 | 45 – 46 | ≥ 50.85 | 13.9 – 15 | ≥ 42.7 | 30 – 32.4 | ≥ 11.1 | M30x1,5 |
| (M33) | 3.5 | 49 – 50 | ≥ 55.37 | 15.4 – 16.5 | ≥ 46.6 | 33 – 35.6 | ≥ 12.3 | (M33x2) |
| M36 | 4 | 53.8 – 55 | ≥ 60.79 | 16.9 – 18 | ≥ 51.1 | 36 – 38.9 | ≥ 13.5 | M36x1,5 |
| (M39) | 4 | 58.8 – 60 | ≥ 66.44 | 18.2 – 19.5 | ≥ 55.9 | 39 – 42.1 | ≥ 14.6 | (M39x1,5) |
| M42 | 4.5 | 63.1 – 65 | ≥ 71.3 | 19.7 – 21 | ≥ 60 | 42 – 45.4 | ≥ 15.8 | M42x1,5 |
| (M45) | 4.5 | 68.1 – 70 | ≥ 76.95 | 21.2 – 22.5 | ≥ 64.7 | 45 – 48.6 | ≥ 17 | (M45x1,5) |
| M48 | 5 | 73.1 – 75 | ≥ 82.6 | 22.7 – 24 | ≥ 69.4 | 48 – 51.8 | ≥ 18.2 | M48x1,5 |
| (M52) | 5 | 78.1 – 80 | ≥ 88.25 | 24.7 – 26 | ≥ 74.2 | 52 – 56.2 | ≥ 19.8 | (M52x1,5) |
Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet.