For neoprene washers, DIN 125 A is the governing document for the dimensions listed below. Mechanical and performance requirements for this part family are set by its own standards, not by the bolt and screw property-class documents.
DIN 125 A — Scope
The table below lists the dimensions catalogued for neoprene washers under DIN 125 A. The scope of DIN 125 A 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 125 A. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by DIN 125 A
| Thread size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness s (mm) | Hardness (Shore A) | Temperature range (deg C) | Reference standard |
|---|---|---|---|---|---|---|
| M3 | 3.2 | 7 | 1.0 | 60 | -35 to +100 | DIN 125 A series |
| M4 | 4.3 | 9 | 1.5 | 60 | -35 to +100 | DIN 125 A series |
| M5 | 5.3 | 10 | 1.5 | 60 | -35 to +100 | DIN 125 A series |
| M6 | 6.4 | 12 | 2.0 | 60 | -35 to +100 | DIN 125 A series |
| M8 | 8.4 | 16 | 2.0 | 60 | -35 to +100 | DIN 125 A series |
| M10 | 10.5 | 20 | 3.0 | 60 | -35 to +100 | DIN 125 A series |
| M12 | 13 | 24 | 3.0 | 60 | -35 to +100 | DIN 125 A series |
| M16 | 17 | 30 | 3.0 | 60 | -35 to +100 | DIN 125 A series |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Neoprene Washers page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 125 A
DIN 125 A 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 washer to this standard in a non-standard size?
Parts built to DIN 125 A 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.
