The table below lists the dimensions catalogued for t-slot nuts (din 508) under DIN 508. The scope of DIN 508 itself is not summarised here — where a figure matters, confirm it against the published document.
DIN 508 — Scope
The table below lists the dimensions catalogued for t-slot nuts (din 508) under DIN 508. The scope of DIN 508 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 508. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by DIN 508
| Size | T-slot width a (mm) | Nut width b (mm) | Total height h (mm) | Neck height k (mm) | Chamfer f (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M4 | 5 | 9 | 6.5 | 3 | 1 | DIN 508 |
| M5 | 6 | 10 | 8 | 4 | 1.6 | DIN 508 |
| M6 | 8 | 13 | 10 | 6 | 1.6 | DIN 508 |
| M8 | 10 | 15 | 12 | 6 | 1.6 | DIN 508 |
| M10 | 12 | 18 | 14 | 7 | 2.5 | DIN 508 |
| M12 | 14 | 22 | 16 | 8 | 2.5 | DIN 508 |
| M16 | 18 | 28 | 20 | 10 | 2.5 | DIN 508 |
| M20 | 22 | 35 | 28 | 14 | 2.5 | DIN 508 |
| M24 | 28 | 44 | 36 | 18 | 4 | DIN 508 |
| M30 | 36 | 54 | 44 | 22 | 6 | DIN 508 |
| M36 | 42 | 65 | 52 | 26 | 6 | DIN 508 |
| M42 | 48 | 75 | 60 | 30 | 6 | DIN 508 |
| M48 | 54 | 85 | 70 | 34 | 6 | DIN 508 |
Companion Standards
A complete specification for t-slot nuts (din 508) normally cites several documents: one for the geometry, one for the material or mechanical properties, and one for the finish. DIN 508 is one of them, not all of them.
When to Specify DIN 508
DIN 508 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 508 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.
