The table below lists the dimensions catalogued for hex thick nuts (din 6330) under DIN 6330. The scope of DIN 6330 itself is not summarised here — where a figure matters, confirm it against the published document.
DIN 6330 — Scope
The table below lists the dimensions catalogued for hex thick nuts (din 6330) under DIN 6330. The scope of DIN 6330 itself is not summarised here — where a figure matters, confirm it against the published document.
Tolerance & Product Grades
Product grade is a concept from dimensional fastener standards and does not apply to DIN 6330. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by DIN 6330
| Thread size | Pitch (mm) | Width across flats s (mm) | Nut height m (mm) | Height ratio m/d | Engaged threads | Property class | Reference standard |
|---|---|---|---|---|---|---|---|
| M8 | 1.25 | 13.0 | 12.0 | 1.5 | approx. 9.6 | 10 | DIN 6330 |
| M10 | 1.5 | 17.0 | 15.0 | 1.5 | approx. 10.0 | 10 | DIN 6330 |
| M12 | 1.75 | 19.0 | 18.0 | 1.5 | approx. 10.3 | 10 | DIN 6330 |
| M16 | 2.0 | 24.0 | 24.0 | 1.5 | approx. 12.0 | 10 | DIN 6330 |
| M20 | 2.5 | 30.0 | 30.0 | 1.5 | approx. 12.0 | 10 | DIN 6330 |
| M24 | 3.0 | 36.0 | 36.0 | 1.5 | approx. 12.0 | 10 | DIN 6330 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Hex Thick Nuts (DIN 6330) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 6330
DIN 6330 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.
Custom manufacturing · Made to drawing
Need a nut to this standard in a non-standard size?
Parts built to DIN 6330 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
