DINReplaced → ISO 4035Draft · single source
DIN 439 A
Hexagon thin nuts — Form A — without chamfer
- 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 A | 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 |
|---|---|---|---|---|
| M2 | 0.4 | 4 | 4.32 | 1.2 |
| M3 | 0.5 | 5.5 | 6.01 | 1.8 |
| M4 | 0.7 | 7 | 7.66 | 2.2 |
| M5 | 0.8 | 8 | 8.79 | 2.7 |
| M6 | 1 | 10 | 11.05 | 3.2 |
| M8 | 1.25 | 13 | 14.38 | 4 |
| M10 | 1.5 | 17 | 18.9 | 5 |
| M12 | 1.75 | 19 | 21.1 | 6 |
| M14 | 2 | 22 | 24.49 | 7 |
| M16 | 2 | 24 | 26.75 | 8 |
| M18 | 2.5 | 27 | 29.56 | 9 |
| M20 | 2.5 | 30 | 32.95 | 10 |
| M22 | 2.5 | 32 | 35.03 | 11 |
| M24 | 3 | 36 | 39.55 | 12 |
| M27 | 3 | 41 | 45.2 | 13.5 |
| M30 | 3.5 | 46 | 50.85 | 15 |
| M33 | 3.5 | 50 | 55.37 | 16.5 |
| M36 | 4 | 55 | 60.79 | 18 |
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.