The table below lists the dimensions catalogued for panel nuts (thin, fine pitch) under DIN 439. The scope of DIN 439 itself is not summarised here — where a figure matters, confirm it against the published document.
DIN 439 — Scope
The table below lists the dimensions catalogued for panel nuts (thin, fine pitch) under DIN 439. The scope of DIN 439 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 439. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by DIN 439
| Thread size | Pitch (mm) | Across flats s (mm) | Across corners e (mm) | Nut height m (mm) | Typical application | Reference standard |
|---|---|---|---|---|---|---|
| M6x0.75 | 0.75 | 10 | 11.05 | 3.2 | Potentiometer bushing | DIN 439 B |
| M8x0.75 | 0.75 | 13 | 14.38 | 4.0 | Toggle switch bushing | DIN 439 B |
| M9x0.75 | 0.75 | 14 | 15.51 | 4.0 | Rotary switch bushing | DIN 439 B |
| M10x0.75 | 0.75 | 17 | 18.90 | 5.0 | Indicator lamp | DIN 439 B |
| M12x1 | 1.0 | 19 | 21.10 | 5.0 | Cable gland PG/M12 | DIN 439 B |
| M16x1.5 | 1.5 | 24 | 26.75 | 6.0 | Cable gland M16 | DIN 439 B |
| M20x1.5 | 1.5 | 30 | 33.53 | 8.0 | Cable gland M20 | DIN 439 B |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Panel Nuts (Thin, Fine Pitch) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 439
DIN 439 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 439 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.
