Retaining Rings (Circlips) manufactured to DIN 472 follow a specific scope. This page summarizes that scope, lists every dimension the standard fixes, and points to the most common cross-references.
DIN 472 — Scope
DIN 472 specifies the dimensions and tolerances of retaining rings (circlips). Material, property class, surface finish and packaging are governed by separate documents in the same standards family (for example ISO 898-1 for the mechanical property classes of bolts and screws).
Tolerance & Product Grades
DIN 472, alongside the related DIN 471 / DIN 472 entries on this site, specifies product grades (typically A or B for fine work and C for general engineering) and tolerance classes for the controlling dimensions. Choose the grade against the precision your application requires.
Dimensions Specified by DIN 472
| Nominal diameter (mm) | Ring diameter d1 (mm) | Groove diameter d2 (mm) | Thickness s (mm) | Groove depth ref (mm) | Type / standard |
|---|---|---|---|---|---|
| 3 | 2.7 | 2.5 | 0.4 | 3.5 | DIN 471 external |
| 4 | 3.7 | 3.4 | 0.4 | 4.5 | DIN 471 external |
| 5 | 4.7 | 4.4 | 0.6 | 5.5 | DIN 471 external |
| 6 | 5.6 | 5.3 | 0.7 | 6.5 | DIN 471 external |
| 7 | 6.5 | 6.2 | 0.8 | 7.5 | DIN 471 external |
| 8 | 7.4 | 7.1 | 0.8 | 8.5 | DIN 471 external |
| 9 | 8.4 | 8.1 | 1.0 | 9.5 | DIN 471 external |
| 10 | 9.3 | 9.0 | 1.0 | 10.5 | DIN 471 external |
| 11 | 10.2 | 9.9 | 1.0 | 11.5 | DIN 471 external |
| 12 | 11.1 | 10.8 | 1.0 | 12.5 | DIN 471 external |
| 14 | 13.0 | 12.7 | 1.0 | 14.5 | DIN 471 external |
| 15 | 14.0 | 13.7 | 1.0 | 15.5 | DIN 471 external |
| 16 | 15.0 | 14.7 | 1.0 | 16.5 | DIN 471 external |
| 17 | 16.0 | 15.7 | 1.0 | 17.5 | DIN 471 external |
| 18 | 17.0 | 16.7 | 1.2 | 18.5 | DIN 471 external |
| 19 | 18.0 | 17.7 | 1.2 | 19.5 | DIN 471 external |
| 20 | 19.0 | 18.7 | 1.2 | 20.5 | DIN 471 external |
| 22 | 21.0 | 20.7 | 1.2 | 22.5 | DIN 471 external |
| 24 | 22.9 | 22.6 | 1.2 | 24.5 | DIN 471 external |
| 25 | 23.9 | 23.6 | 1.2 | 25.5 | DIN 471 external |
| 28 | 26.9 | 26.6 | 1.5 | 29.0 | DIN 471 external |
| 30 | 28.9 | 28.6 | 1.5 | 31.0 | DIN 471 external |
| 32 | 30.9 | 30.6 | 1.5 | 33.0 | DIN 471 external |
| 35 | 33.8 | 33.5 | 1.5 | 36.0 | DIN 471 external |
| 40 | 38.5 | 38.2 | 1.75 | 41.0 | DIN 471 external |
| 45 | 43.5 | 43.2 | 1.75 | 46.0 | DIN 471 external |
| 50 | 48.5 | 48.2 | 2.0 | 51.0 | DIN 471 external |
| 55 | 53.3 | 53.0 | 2.0 | 56.5 | DIN 471 external |
| 60 | 58.3 | 58.0 | 2.0 | 61.5 | DIN 471 external |
| 65 | 63.3 | 63.0 | 2.5 | 67.0 | DIN 471 external |
| 70 | 68.3 | 68.0 | 2.5 | 72.0 | DIN 471 external |
| 75 | 73.3 | 73.0 | 2.5 | 77.0 | DIN 471 external |
| 80 | 78.0 | 77.7 | 2.5 | 82.0 | DIN 471 external |
| 85 | 83.0 | 82.7 | 3.0 | 87.0 | DIN 471 external |
| 90 | 88.0 | 87.7 | 3.0 | 92.0 | DIN 471 external |
| 95 | 93.0 | 92.7 | 3.0 | 97.0 | DIN 471 external |
| 100 | 98.0 | 97.7 | 3.0 | 102.0 | DIN 471 external |
| 8 | 8.4 | 8.7 | 0.8 | 7.5 | DIN 472 internal |
| 9 | 9.4 | 9.7 | 1.0 | 8.5 | DIN 472 internal |
| 10 | 10.4 | 10.7 | 1.0 | 9.5 | DIN 472 internal |
| 11 | 11.4 | 11.7 | 1.0 | 10.4 | DIN 472 internal |
| 12 | 12.5 | 12.8 | 1.0 | 11.4 | DIN 472 internal |
| 13 | 13.5 | 13.8 | 1.0 | 12.4 | DIN 472 internal |
| 14 | 14.5 | 14.8 | 1.0 | 13.4 | DIN 472 internal |
| 15 | 15.5 | 15.8 | 1.0 | 14.3 | DIN 472 internal |
| 16 | 16.5 | 16.8 | 1.0 | 15.3 | DIN 472 internal |
| 17 | 17.5 | 17.8 | 1.0 | 16.3 | DIN 472 internal |
| 18 | 18.5 | 18.8 | 1.2 | 17.2 | DIN 472 internal |
| 19 | 19.5 | 19.8 | 1.2 | 18.2 | DIN 472 internal |
| 20 | 20.5 | 20.8 | 1.2 | 19.2 | DIN 472 internal |
| 22 | 22.5 | 22.9 | 1.2 | 21.2 | DIN 472 internal |
| 24 | 24.5 | 24.9 | 1.2 | 23.2 | DIN 472 internal |
| 25 | 25.5 | 25.9 | 1.2 | 24.2 | DIN 472 internal |
| 28 | 28.6 | 29.0 | 1.5 | 27.0 | DIN 472 internal |
| 30 | 30.6 | 31.0 | 1.5 | 29.0 | DIN 472 internal |
| 32 | 32.6 | 33.0 | 1.5 | 31.0 | DIN 472 internal |
| 35 | 35.7 | 36.1 | 1.5 | 34.0 | DIN 472 internal |
| 40 | 40.8 | 41.3 | 1.75 | 39.0 | DIN 472 internal |
| 45 | 45.8 | 46.3 | 1.75 | 44.0 | DIN 472 internal |
| 50 | 51.0 | 51.5 | 2.0 | 49.0 | DIN 472 internal |
| 55 | 56.0 | 56.5 | 2.0 | 54.0 | DIN 472 internal |
| 60 | 61.0 | 61.5 | 2.0 | 59.0 | DIN 472 internal |
| 65 | 66.2 | 66.8 | 2.5 | 64.0 | DIN 472 internal |
| 70 | 71.2 | 71.8 | 2.5 | 69.0 | DIN 472 internal |
| 75 | 76.2 | 76.8 | 2.5 | 74.0 | DIN 472 internal |
| 80 | 81.2 | 81.8 | 2.5 | 79.0 | DIN 472 internal |
| 85 | 86.5 | 87.1 | 3.0 | 84.0 | DIN 472 internal |
| 90 | 91.5 | 92.1 | 3.0 | 89.0 | DIN 472 internal |
| 95 | 96.5 | 97.1 | 3.0 | 94.0 | DIN 472 internal |
| 100 | 101.5 | 102.1 | 3.0 | 99.0 | DIN 472 internal |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Retaining Rings (Circlips) page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
DIN 472 controls only the geometry of retaining rings (circlips). The mechanical strength is set by ISO 898-1 (bolts and screws) or ISO 898-2 (nuts); the surface finish is governed by separate finish standards (e.g. ISO 4042 for electroplating). For corrosion testing, the relevant document is ISO 9227 (neutral salt spray).