DIN 929 is the governing dimensional standard for hexagon weld nuts. This page sets out the scope of the standard, reproduces the full size table it specifies, and lists the DIN/ISO/ASME cross-references commonly cited in datasheets and drawings.
DIN 929 — Scope
DIN 929 is "Hexagon weld nuts".
Material, property class, surface finish and packaging are governed by separate documents — ISO 898-1 and ISO 898-2 for mechanical property classes, ISO 4042 for electroplated finishes.
Tolerance & Product Grades
DIN 929 does not divide hexagon weld nuts into product grades. Tolerances are given as limits on the individual dimensions in the table.
Where a general-tolerance class is cited on the drawing instead, it applies to the dimensions not otherwise toleranced.
Dimensions Specified by DIN 929
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Nut height m (mm) | Pilot diameter d2 (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M3 | 0.5 | 7.5 | 8.15 | 3 | 4.5 | DIN 929 |
| M4 | 0.7 | 9 | 9.83 | 3.5 | 6 | DIN 929 |
| M5 | 0.8 | 10 | 10.95 | 4 | 7 | DIN 929 |
| M6 | 1.0 | 11 | 12.02 | 5 | 8 | DIN 929 |
| M8 | 1.25 | 14 | 15.38 | 6.5 | 10.5 | DIN 929 |
| M10 | 1.5 | 17 | 18.74 | 8 | 12.5 | DIN 929 |
| M12 | 1.75 | 19 | 20.91 | 10 | 14.8 | DIN 929 |
| M14 | 2.0 | 22 | 24.27 | 11 | 16.8 | DIN 929 |
| M16 | 2.0 | 24 | 26.51 | 13 | 18.8 | DIN 929 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Hexagon Weld Nuts page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 929
DIN 929 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 929 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.
