Push-On Retaining Ring
Retaining Rings & Clips · starlock washer · push nut · cap washer · push-on fastener
Definition: A push-on retaining ring is a stamped ring with inward teeth that slides onto a plain shaft and grips it, retaining parts without a groove.
Anatomy & Schematic
■ Ring body■ Opening
Governing standards: Manufacturer specified (no universal standard)
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 1/8 shaft | 3 mm | — | — |
| 1/4 shaft | 6 mm | — | — |
| 1/2 shaft | 12 mm | — | — |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Spring steel | spring steel | — | None |
| Stainless | stainless steel | — | None |
Materials
- Spring steel
- Stainless steel
Pros & Cons
Pros
- No groove needed
- Push-on install
- Cheap in bulk
Cons
- Low retention force
- Typically single-use
- Teeth chew the shaft on removal
Typical Uses
- Toy wheels
- Linkages
- Light shafts
- Cap retention
Alternatives & Related
Where to Buy
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FAQ
What is a push-on retaining ring?
A stamped ring with inward teeth that pushes onto a shaft and grips it — no groove needed, for light retention.
Can you remove a push-on ring?
You can pry it off, but the teeth usually deform and the shaft may be scored — treat them as single-use.