--- title: "DIN 471 Retaining Rings (Circlips) Specification" description: "DIN 471 Retaining Rings (Circlips): full dimensional table with tolerances. DIN, ISO and ASME equivalents listed side by side." url: https://engineeringhardware.com/guide/standard/din-471-retaining-rings-circlips/ source: Engineering Hardware & Fasteners --- # DIN 471 Retaining Rings (Circlips) Specification Retaining Rings · DIN 471 / DIN 472 Dimensional table, tolerance classes and the DIN / ISO / ASME parts that supersede or match this standard. DIN 471 specifies the dimensions and tolerances for retaining rings (circlips). The full dimensional table is reproduced below, followed by the DIN, ISO and ASME parts that match or supersede it. - **Standard:** DIN 471 - **Product:** Retaining Rings (Circlips) - **Governing standards:** DIN 471 / DIN 472 Equivalence between national standards is dimensional, not always metallurgical. Check the property class separately when substituting. ![DIN 471 Retaining Rings (Circlips) Specification reference image](https://engineeringhardware.com/wp-content/uploads/2026/09/External-and-Internal-Retaining-Rings.webp) Specification summary of DIN 471 as applied to retaining rings (circlips): the dimensions the standard fixes, the full size range supplied, and the related designations commonly cross-referenced. ## 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 rings (circlips) 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 / bore diameter (mm) | Ring free diameter (mm) | Groove diameter (mm) | Ring thickness s (mm) | Groove width m min (mm) | Type / standard | | --- | --- | --- | --- | --- | --- | | 3 | 2.7 | per DIN 471 - confirm for this size | 0.4 | per DIN 471 - confirm for this size | DIN 471 external | | 4 | 3.7 | per DIN 471 - confirm for this size | 0.4 | per DIN 471 - confirm for this size | DIN 471 external | | 5 | 4.7 | per DIN 471 - confirm for this size | 0.6 | per DIN 471 - confirm for this size | DIN 471 external | | 6 | 5.6 | per DIN 471 - confirm for this size | 0.7 | per DIN 471 - confirm for this size | DIN 471 external | | 7 | 6.5 | per DIN 471 - confirm for this size | 0.8 | per DIN 471 - confirm for this size | DIN 471 external | | 8 | 7.4 | per DIN 471 - confirm for this size | 0.8 | per DIN 471 - confirm for this size | DIN 471 external | | 9 | 8.4 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 10 | 9.3 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 11 | 10.2 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 12 | 11.1 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 14 | 13.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 15 | 14.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 16 | 15.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 17 | 16.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 18 | 17.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 19 | 18.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 20 | 19.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 22 | 21.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 24 | 22.9 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 25 | 23.9 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 28 | 26.9 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 30 | 28.9 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 32 | 30.9 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 35 | 33.8 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 40 | 38.5 | per DIN 471 - confirm for this size | 1.75 | per DIN 471 - confirm for this size | DIN 471 external | | 45 | 43.5 | per DIN 471 - confirm for this size | 1.75 | per DIN 471 - confirm for this size | DIN 471 external | | 50 | 48.5 | per DIN 471 - confirm for this size | 2.0 | per DIN 471 - confirm for this size | DIN 471 external | | 55 | 53.3 | per DIN 471 - confirm for this size | 2.0 | per DIN 471 - confirm for this size | DIN 471 external | | 60 | 58.3 | per DIN 471 - confirm for this size | 2.0 | per DIN 471 - confirm for this size | DIN 471 external | | 65 | 63.3 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 70 | 68.3 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 75 | 73.3 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 80 | 78.0 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 85 | 83.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 90 | 88.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 95 | 93.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 100 | 98.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 8 | 8.7 | 8.4 | 0.8 | per DIN 472 - confirm for this size | DIN 472 internal | | 9 | 9.7 | 9.4 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 10 | 10.7 | 10.4 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 11 | 11.7 | 11.4 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 12 | 12.8 | 12.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 13 | 13.8 | 13.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 14 | 14.8 | 14.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 15 | 15.8 | 15.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 16 | 16.8 | 16.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 17 | 17.8 | 17.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 18 | 18.8 | 18.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 19 | 19.8 | 19.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 20 | 20.8 | 20.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 22 | 22.9 | 22.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 24 | 24.9 | 24.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 25 | 25.9 | 25.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 28 | 29.0 | 28.6 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 30 | 31.0 | 30.6 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 32 | 33.0 | 32.6 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 35 | 36.1 | 35.7 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 40 | 41.3 | 40.8 | 1.75 | per DIN 472 - confirm for this size | DIN 472 internal | | 45 | 46.3 | 45.8 | 1.75 | per DIN 472 - confirm for this size | DIN 472 internal | | 50 | 51.5 | 51.0 | 2.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 55 | 56.5 | 56.0 | 2.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 60 | 61.5 | 61.0 | 2.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 65 | 66.8 | 66.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 70 | 71.8 | 71.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 75 | 76.8 | 76.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 80 | 81.8 | 81.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 85 | 87.1 | 86.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 90 | 92.1 | 91.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 95 | 97.1 | 96.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 100 | 102.1 | 101.5 | 3.0 | per DIN 472 - confirm for this size | 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 471 controls the geometry of retaining rings (circlips). 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. 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. [Custom retaining ring manufacturing](https://engineeringhardware.com/custom/rings/)[Send a drawing](https://engineeringhardware.com/custom/rings/#rfq) ## Technical Drawing Dimensioned line drawing of 3 Retaining Rings (Circlips) to DIN 471 / DIN 472. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected. - **Ring free diameter (mm):** 2.7 - **Groove diameter (mm):** per DIN 471 - confirm for this size - **Ring thickness s (mm):** 0.4 - **Groove width m min (mm):** per DIN 471 - confirm for this size - **Type / standard:** DIN 471 external ## Dimensions & Specifications (DIN 471 / DIN 472) | Nominal shaft / bore diameter (mm) | Ring free diameter (mm) | Groove diameter (mm) | Ring thickness s (mm) | Groove width m min (mm) | Type / standard | | --- | --- | --- | --- | --- | --- | | 3 | 2.7 | per DIN 471 - confirm for this size | 0.4 | per DIN 471 - confirm for this size | DIN 471 external | | 4 | 3.7 | per DIN 471 - confirm for this size | 0.4 | per DIN 471 - confirm for this size | DIN 471 external | | 5 | 4.7 | per DIN 471 - confirm for this size | 0.6 | per DIN 471 - confirm for this size | DIN 471 external | | 6 | 5.6 | per DIN 471 - confirm for this size | 0.7 | per DIN 471 - confirm for this size | DIN 471 external | | 7 | 6.5 | per DIN 471 - confirm for this size | 0.8 | per DIN 471 - confirm for this size | DIN 471 external | | 8 | 7.4 | per DIN 471 - confirm for this size | 0.8 | per DIN 471 - confirm for this size | DIN 471 external | | 9 | 8.4 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 10 | 9.3 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 11 | 10.2 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 12 | 11.1 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 14 | 13.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 15 | 14.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 16 | 15.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 17 | 16.0 | per DIN 471 - confirm for this size | 1.0 | per DIN 471 - confirm for this size | DIN 471 external | | 18 | 17.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 19 | 18.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 20 | 19.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 22 | 21.0 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 24 | 22.9 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 25 | 23.9 | per DIN 471 - confirm for this size | 1.2 | per DIN 471 - confirm for this size | DIN 471 external | | 28 | 26.9 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 30 | 28.9 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 32 | 30.9 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 35 | 33.8 | per DIN 471 - confirm for this size | 1.5 | per DIN 471 - confirm for this size | DIN 471 external | | 40 | 38.5 | per DIN 471 - confirm for this size | 1.75 | per DIN 471 - confirm for this size | DIN 471 external | | 45 | 43.5 | per DIN 471 - confirm for this size | 1.75 | per DIN 471 - confirm for this size | DIN 471 external | | 50 | 48.5 | per DIN 471 - confirm for this size | 2.0 | per DIN 471 - confirm for this size | DIN 471 external | | 55 | 53.3 | per DIN 471 - confirm for this size | 2.0 | per DIN 471 - confirm for this size | DIN 471 external | | 60 | 58.3 | per DIN 471 - confirm for this size | 2.0 | per DIN 471 - confirm for this size | DIN 471 external | | 65 | 63.3 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 70 | 68.3 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 75 | 73.3 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 80 | 78.0 | per DIN 471 - confirm for this size | 2.5 | per DIN 471 - confirm for this size | DIN 471 external | | 85 | 83.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 90 | 88.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 95 | 93.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 100 | 98.0 | per DIN 471 - confirm for this size | 3.0 | per DIN 471 - confirm for this size | DIN 471 external | | 8 | 8.7 | 8.4 | 0.8 | per DIN 472 - confirm for this size | DIN 472 internal | | 9 | 9.7 | 9.4 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 10 | 10.7 | 10.4 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 11 | 11.7 | 11.4 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 12 | 12.8 | 12.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 13 | 13.8 | 13.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 14 | 14.8 | 14.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 15 | 15.8 | 15.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 16 | 16.8 | 16.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 17 | 17.8 | 17.5 | 1.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 18 | 18.8 | 18.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 19 | 19.8 | 19.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 20 | 20.8 | 20.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 22 | 22.9 | 22.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 24 | 24.9 | 24.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 25 | 25.9 | 25.5 | 1.2 | per DIN 472 - confirm for this size | DIN 472 internal | | 28 | 29.0 | 28.6 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 30 | 31.0 | 30.6 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 32 | 33.0 | 32.6 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 35 | 36.1 | 35.7 | 1.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 40 | 41.3 | 40.8 | 1.75 | per DIN 472 - confirm for this size | DIN 472 internal | | 45 | 46.3 | 45.8 | 1.75 | per DIN 472 - confirm for this size | DIN 472 internal | | 50 | 51.5 | 51.0 | 2.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 55 | 56.5 | 56.0 | 2.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 60 | 61.5 | 61.0 | 2.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 65 | 66.8 | 66.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 70 | 71.8 | 71.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 75 | 76.8 | 76.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 80 | 81.8 | 81.2 | 2.5 | per DIN 472 - confirm for this size | DIN 472 internal | | 85 | 87.1 | 86.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 90 | 92.1 | 91.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 95 | 97.1 | 96.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | | 100 | 102.1 | 101.5 | 3.0 | per DIN 472 - confirm for this size | DIN 472 internal | ## Materials & Grades Select a material class to see the grades we supply it in. Each designation is listed with its ISO/EN, AISI/SAE, JIS and GB equivalents. Stainless Steel38 Carbon Steel66 Alloy Steel41 Bearing Steel5 Spring Steel25 Aluminum and Aluminum Alloys21 Brass17 Bronze11 Copper8 Titanium and Titanium Alloys18 Nickel and Nickel Alloys22 Iron-Nickel and High-Temperature Alloys10 Tool Steel and Specialty Hardened Steel9 Structural and Construction Steel9 ### Stainless Steel #### Austenitic Stainless Steel - A1 AISI 303 · SAE 303 · SUS303 · EN 1.4305 · X8CrNiS18-9 - A2 AISI 304 · SAE 304 · SUS304 · EN 1.4301 · X5CrNi18-10 · 06Cr19Ni10 - 304L AISI 304L · SUS304L · EN 1.4307 · X2CrNi18-9 · 022Cr19Ni10 - 302 AISI 302 · SUS302 · EN 1.4310 - 305 AISI 305 · SUS305 · EN 1.4303 - A4 AISI 316 · SAE 316 · SUS316 · EN 1.4401 · X5CrNiMo17-12-2 · 06Cr17Ni12Mo2 - 316L AISI 316L · SUS316L · EN 1.4404 · X2CrNiMo17-12-2 · 022Cr17Ni12Mo2 - 321 AISI 321 · SUS321 · EN 1.4541 · X6CrNiTi18-10 - 310 / 310S AISI 310 · AISI 310S · SUS310S · EN 1.4845 - 302HQ AISI 302HQ - A3 - A5 - 347 AISI 347 · SUS347 · EN 1.4550 · X6CrNiNb18-10 - 309 / 309S AISI 309 · AISI 309S · SUS309S #### Martensitic Stainless Steel - AISI 410 SUS410 · EN 1.4006 · X12Cr13 · 12Cr13 - AISI 420 SUS420J1 · SUS420J2 · EN 1.4021 · EN 1.4028 · 20Cr13 · 30Cr13 - AISI 431 SUS431 · EN 1.4057 · X17CrNi16-2 - C1 - C3 - C4 - AISI 440A - AISI 440B - AISI 440C SUS440C · EN 1.4125 #### Ferritic Stainless Steel - AISI 430 SUS430 · EN 1.4016 · X6Cr17 · 10Cr17 - F1 - AISI 434 - AISI 444 #### Precipitation-Hardening Stainless Steel - 17-4 PH AISI 630 · UNS S17400 · SUS630 · EN 1.4542 · X5CrNiCuNb16-4 - 15-5 PH UNS S15500 - 17-7 PH UNS S17700 #### Duplex and Super Duplex Stainless Steel - Duplex 2205 UNS S31803 · UNS S32205 · EN 1.4462 - Super Duplex 2507 UNS S32750 · EN 1.4410 - D2 - D4 - D6 - D8 - Lean Duplex 2101 UNS S32101 - Super Duplex S32760 UNS S32760 · EN 1.4501 ### Carbon Steel #### Low-Carbon Steel - SAE 1006 - SAE 1008 - SAE 1010 - SAE 1018 - SAE 1020 - Q195 - Q235 - SAE 1012 - SAE 1015 - Q215 - ML08 - ML08Al - ML10 - ML15 - ML20 - SWRCH6A - SWRCH8A - SWRCH10A - SWRCH12A - SWRCH15A - SWRCH18A #### Medium-Carbon Steel - SAE 1035 - SAE 1045 - S45C - C45 - SAE 1030 - SAE 1040 - SAE 1050 - 30 - 35 - 40 - 45 - 50 - S35C - S40C - S50C - C35 - C40 #### High-Carbon Steel - SAE 1060 - SAE 1070 - 65Mn - SAE 1065 - SAE 1075 - SAE 1080 - SAE 1085 - SAE 1090 - SAE 1095 - 60 - 65 - 70 - 75 - 80 - 85 #### Cold-Heading Steel - SWRCH22A - 10B21 - SWRCH22K - SWRCH25K - SWRCH30K - SWRCH35K - SWRCH40K - ML20Mn - ML25 - ML30 - ML35 - ML40 - 15B25 ### Alloy Steel #### Chromium Steel - 40Cr - 45Cr - AISI 5140 - SAE 5140 - AISI 5120 - SAE 5120 - SCr420 - SCr440 #### Chromium-Molybdenum Steel - 35CrMo - 42CrMo - AISI 4140 - SCM435 - SCM440 - 42CrMo4 - 30CrMo - AISI 4130 - SAE 4130 - SAE 4140 - AISI 4142 - AISI 4145 - SCM415 - SCM420 - SCM445 - EN 1.7220 - EN 1.7225 - 25CrMo4 - 34CrMo4 #### Nickel-Chromium-Molybdenum Steel - AISI 4340 - SAE 4340 - 40CrNiMo - SNCM439 - EN 1.6511 - 36CrNiMo4 #### Boron Alloy Steel - 10B22 - 10B21 - 15B21 - 15B25 - 20MnTiB - 20Mn2B - 35VB - 40MnB ### Bearing Steel #### Bearing Steel - GCr15 - AISI 52100 SAE 52100 · UNS G52986 - SUJ2 - 100Cr6 EN 1.3505 - GCr15SiMn ### Spring Steel #### Carbon Spring Steel - SAE 1065 - SAE 1070 - SAE 1075 - SAE 1080 - SAE 1095 - 65 - 70 - 75 - 80 - 65Mn #### Silicon-Manganese Spring Steel - 60Si2Mn - 60Si2MnA - SUP6 - SUP7 #### Chromium-Vanadium Spring Steel - 50CrVA - SAE 6150 - AISI 6150 - SUP10 #### Stainless Spring Steel - AISI 301 - SUS301 - EN 1.4310 - AISI 302 - AISI 304 - AISI 316 - 17-7 PH ### Aluminum and Aluminum Alloys #### Commercially Pure Aluminum - 1050 - 1060 - 1070 - 1100 #### 2xxx Series Aluminum - 2024 - 2011 - 2014 - 2017 #### 5xxx Series Aluminum - 5052 - 5083 - 5754 #### 6xxx Series Aluminum - 6061 - 6061-T6 - 6063 - 6082 - 6082-T6 #### 7xxx Series Aluminum - 7075 - 7075-T6 - 7005 - 7050 - 7075-T73 ### Brass #### Free-Cutting Brass - C36000 - H62 - HPb59-1 - C3601 - C3602 - C3604 - CuZn36Pb3 - CuZn39Pb3 - EN CW614N - EN CW617N - H65 #### Lead-Free Brass - C69300 - C27450 - CW510L - CW511L #### Naval Brass - C46400 - CuZn39Sn1 ### Bronze #### Silicon Bronze - C65500 - C65100 - C65600 #### Phosphor Bronze - C51000 - C52100 - CuSn6 - CuSn8 #### Aluminum Bronze - C95400 - C95500 - C63000 - CuAl10Ni5Fe4 ### Copper #### Copper - C11000 - T2 - C10100 - C10200 - C12200 - T1 - TU1 - TU2 ### Titanium and Titanium Alloys #### Commercially Pure Titanium - Grade 2 - Grade 1 - Grade 3 - Grade 4 - TA1 - TA2 - TA3 #### Alpha-Beta Titanium Alloys - Grade 5 - Ti-6Al-4V - TC4 - UNS R56400 #### Low-Interstitial Grade - Grade 23 - Ti-6Al-4V ELI - UNS R56407 #### Other Titanium Fastener Alloys - Ti-6Al-6V-2Sn - Ti-6Al-2Sn-4Zr-2Mo - Beta-C titanium - Ti-10V-2Fe-3Al ### Nickel and Nickel Alloys #### Commercially Pure Nickel - Nickel 200 - UNS N02200 - Nickel 201 - UNS N02201 #### Inconel Alloys - Inconel 625 UNS N06625 - Inconel 718 UNS N07718 - Inconel 600 UNS N06600 - Inconel 601 UNS N06601 - Inconel 686 UNS N06686 - Inconel X-750 UNS N07750 #### Monel Alloys - Monel 400 UNS N04400 - Monel K-500 UNS N05500 #### Hastelloy Alloys - Hastelloy C-276 UNS N10276 - Hastelloy C-22 UNS N06022 - Hastelloy B-2 UNS N10665 - Hastelloy B-3 UNS N10675 - Hastelloy X UNS N06002 #### Other Nickel Alloys - Alloy 20 UNS N08020 - Alloy 625 - Alloy 718 - Alloy 825 UNS N08825 - Alloy 925 UNS N09925 ### Iron-Nickel and High-Temperature Alloys #### A286 - A-286 - UNS S66286 - EN 1.4980 #### Invar - Invar 36 - Alloy 36 - UNS K93600 - FeNi36 #### Alloy 42 - Alloy 42 - UNS K94100 - FeNi42 ### Tool Steel and Specialty Hardened Steel #### Tool Steel and Specialty Hardened Steel - AISI D2 - AISI H13 - SKD11 - Cr12MoV - AISI O1 - AISI A2 - AISI S7 - SKD61 - 9CrSi ### Structural and Construction Steel #### Structural and Construction Steel - ASTM A36 - Q235B - Q355B - S355JR - Q235C - Q355C - S235JR - S275JR - S355J2 ## Applications & Industries What Retaining Rings are specified for, industry by industry. Stocked from 3 to 100 (shaft / bore diameter). ### Industries that specify Retaining Rings - **Automotive:** Shaft retention throughout the driveline and in accessories. - **Appliances & mechanisms:** Light axial retention on plain shafts. - **Gearboxes & drivetrain:** Retaining bearings, gears and pulleys against axial movement. - **Hydraulics & pneumatics:** Holding pistons, glands and seals in bores. ### Typical applications - axial retention in a machined groove - holding a component on a shaft without a shoulder ### Service conditions to specify against - **Marine and coastal:** Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit. [Full application guide: where Retaining Rings are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/retaining-rings-circlips/) Inside the plant ## Manufactured in our own plant This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided. 1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift. 2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g. 3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1. 4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227. ## Frequently Asked Questions ### Which edition of DIN 471 does this table follow? The table reproduces the dimensions we supply retaining rings (circlips) to. We do not publish an edition year against it, so where the edition is contractually significant, cite the edition you require on the enquiry and we will confirm it against the table before quoting. ### What is DIN 471? DIN 471 is "Retaining rings (circlips) for shafts". The groove dimensions on the shaft are part of the specification, not only the ring. ### What does DIN 471 specify for Retaining Rings (Circlips)? DIN 471 specifies the dimensions and tolerances of retaining rings (circlips). Material and property class are governed by separate documents. ### Does DIN 471 specify the mechanical strength? No. DIN 471 controls the dimensional requirements for retaining rings (circlips). 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 to this product. ### How do I request a quotation? Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day. ## Related Pages [View the full Retaining Rings (Circlips) page](https://engineeringhardware.com/fastener/retaining-rings-circlips/) ### More Retaining Rings (Circlips) Guides