Specification summary of DIN 137 B as applied to wave washers (curved spring washers): the dimensions the standard fixes, the full size range supplied, and the related designations commonly cross-referenced.
DIN 137 B — Scope
The table below lists the dimensions catalogued for wave washers (curved spring washers) under DIN 137 B. The scope of DIN 137 B 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 137 B. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by DIN 137 B
| Thread size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Material thickness s (mm) | Free height h (mm) | Reference standard |
|---|---|---|---|---|---|
| M3 | 3.2 | 6 | 0.3 | 0.7 | DIN 137 B |
| M4 | 4.3 | 8 | 0.3 | 0.8 | DIN 137 B |
| M5 | 5.3 | 10 | 0.4 | 1.0 | DIN 137 B |
| M6 | 6.4 | 11.8 | 0.5 | 1.2 | DIN 137 B |
| M8 | 8.4 | 15 | 0.5 | 1.4 | DIN 137 B |
| M10 | 10.5 | 18 | 0.6 | 1.7 | DIN 137 B |
| M12 | 13 | 20.5 | 0.8 | 2.1 | DIN 137 B |
| M14 | 15 | 24 | 0.8 | 2.3 | DIN 137 B |
| M16 | 17 | 26 | 1.0 | 2.6 | DIN 137 B |
| M20 | 21 | 32 | 1.2 | 3.2 | DIN 137 B |
| M24 | 25 | 38 | 1.5 | 3.8 | DIN 137 B |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Wave Washers (Curved Spring Washers) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
A complete specification for wave washers (curved spring washers) normally cites several documents: one for the geometry, one for the material or mechanical properties, and one for the finish. DIN 137 B is one of them, not all of them.
Custom manufacturing · Made to drawing
Need a washer to this standard in a non-standard size?
Parts built to DIN 137 B 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 stamping or punching.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
