DIN 6921 vs ISO 4162
Hexagon Flange Bolt with Serrated Flange
- Interchangeable
- Not exactly. Same thread, but the wrench size is smaller in ISO 4162 at 5 sizes (M8: 13 mm in DIN 6921, 10 mm in ISO 4162); the head is higher in ISO 4162 at 7 sizes (M10: 9.2 mm in DIN 6921, 9.7 mm in ISO 4162). Order to the number on your drawing.
- Which to order
- ISO 4162 for new drawings. It replaced DIN 6921, and if your drawing says DIN 6921, we make DIN 6921.
- Sizes
- M5 to M16 in both. DIN 6921 goes on to M20.
| Size | sWrench size | eAcross corners | dcFlange Diameter | kNominal Head Height | ||||
|---|---|---|---|---|---|---|---|---|
| DIN 6921 | ISO 4162 | DIN 6921 | ISO 4162 | DIN 6921 | ISO 4162 | DIN 6921 | ISO 4162 | |
| M5 | 8 | 7 | 8.71 | 7.44 | 11.8 | 11.4 | 5.4 | 5.6 |
| M6 | 10 | 8 | 10.95 | 8.56 | 14.2 | 13.6 | 6.6 | 6.8 |
| M8 | 13 | 10 | 14.26 | 10.8 | 18 | 17 | 8.1 | 8.5 |
| M10 | 15 | 13 | 16.5 | 14.08 | 22.3 | 20.8 | 9.2 | 9.7 |
| M12 | 16 | 15 | 17.62 | 16.32 | 26.6 | 24.7 | 11.5 | 11.9 |
| M14 | 18same | 19.86 | 19.68 | 30.5 | 28.6 | 12.8 | 12.9 | |
| M16 | 21same | 23.15 | 22.58 | 35 | 32.8 | 14.4 | 15.1 | |