E-Clip
Retaining Rings & Clips · e-ring · e-clip · external clip
Definition: An E-clip is an external retaining clip shaped like the letter E that snaps into a groove on a shaft to hold parts in place.
Anatomy & Schematic
■ Ring body■ Opening
Governing standards: Manufacturer specified (no universal standard)
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| for 3/16 shaft | 5 mm | 0.375 OD | 0.032 groove |
| for 1/4 shaft | 6 mm | 0.500 OD | 0.039 groove |
| for 3/8 shaft | 10 mm | 0.625 OD | 0.048 groove |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Spring steel | spring steel, zinc-plated | — | None |
| Stainless | spring stainless | — | None |
Materials
- Spring steel (zinc-plated)
- Spring stainless steel
Pros & Cons
Pros
- Pushes on from the side — no spreading
- Cheap and fast
- Small footprint
Cons
- Light duty only
- Needs a machined groove
- Flies off if overloaded
Typical Uses
- Retaining wheels and gears on shafts
- Toy and appliance axles
- Light retention
- Hinges and pivots
Alternatives & Related
- Snap Ring — Higher retention with plier lugs
- Spiral Retaining Ring — 360-degree contact, no lugs
Where to Buy
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FAQ
E-clip vs snap ring?
An E-clip pushes onto a shaft from the side and is light duty; a snap ring spreads over the shaft with pliers and holds more load.
How do you remove an E-clip?
Pry it out of the groove with a small screwdriver or E-clip tool — it will spring off, so wear eye protection.