DIN 471 is the standard cited for retaining ring (circlip). This page sets out what the standard controls for this part, reproduces the dimensional table supplied against it, and notes the related designations referenced on drawings.
DIN 471 — Scope
DIN 471 is "Retaining rings (circlips) for shafts". The groove dimensions on the shaft are part of the specification, not only the ring.
Tolerance & Product Grades
DIN 471 does not divide retaining ring (circlip) — iso / din (series 147) into product grades. Tolerances are given as limits on the individual dimensions in the table.
Where a general-tolerance class is cited on the drawing instead, it applies to the dimensions not otherwise toleranced.
Dimensions Specified by DIN 471
| Nominal shaft diameter (mm) | Ring free diameter (mm) | Groove diameter (mm) | Ring thickness s (mm) | Type | Reference standard |
|---|---|---|---|---|---|
| 8 | 7.4 | per DIN 471 - confirm for this size | 0.8 | External | DIN 471 / GB/T 894 |
| 10 | 9.3 | per DIN 471 - confirm for this size | 1.0 | External | DIN 471 / GB/T 894 |
| 12 | 11.1 | per DIN 471 - confirm for this size | 1.0 | External | DIN 471 / GB/T 894 |
| 16 | 15.0 | per DIN 471 - confirm for this size | 1.0 | External | DIN 471 / GB/T 894 |
| 20 | 19.0 | per DIN 471 - confirm for this size | 1.2 | External | DIN 471 / GB/T 894 |
| 25 | 23.9 | per DIN 471 - confirm for this size | 1.2 | External | DIN 471 / GB/T 894 |
| 30 | 28.9 | per DIN 471 - confirm for this size | 1.5 | External | DIN 471 / GB/T 894 |
| 40 | 38.5 | per DIN 471 - confirm for this size | 1.75 | External | DIN 471 / GB/T 894 |
| 50 | 48.5 | per DIN 471 - confirm for this size | 2.0 | External | DIN 471 / GB/T 894 |
| 60 | 58.3 | per DIN 471 - confirm for this size | 2.0 | External | DIN 471 / GB/T 894 |
| 80 | 78.0 | per DIN 471 - confirm for this size | 2.5 | External | DIN 471 / GB/T 894 |
| 100 | 98.0 | per DIN 471 - confirm for this size | 3.0 | External | DIN 471 / GB/T 894 |
Companion Standards
DIN 471 controls the geometry of retaining ring (circlip) — iso / din (series 147). Surface finish is governed by separate finish standards such as ISO 4042 for electroplating, and corrosion testing by ISO 9227 (neutral salt spray). Mechanical performance is set by the documents specific to this part family — ISO 898-1 and ISO 898-2 apply to bolts, screws, studs and nuts, and not here.
When to Specify DIN 471
DIN 471 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 retaining ring to this standard in a non-standard size?
Parts built to DIN 471 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.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
