Metric E-Clips | McMaster-Carr

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System of Measurement

Groove Diameter

Retaining Ring Style

Retaining Ring Type

Ring Thickness

Groove Width

Material

Ring OD

Ring ID

Finish

Zinc Yellow-Chromate Plated

Specifications Met

ASME B18.27.2

DIN Standard

Side-Mount External Retaining Rings Included

For 3 mm OD (20 Pieces)

For 3 mm OD (40 Pieces)

For 4 mm OD (20 Pieces)

For 4 mm OD (40 Pieces)

For 5 mm OD (20 Pieces)

For 5 mm OD (40 Pieces)

For 6 mm OD (20 Pieces)

For 6 mm OD (40 Pieces)

For 7 mm OD (20 Pieces)

For 7 mm OD (30 Pieces)

For 8 mm OD (20 Pieces)

For 8 mm OD (30 Pieces)

For 9 mm OD (20 Pieces)

For 10 mm OD (10 Pieces)

For 10 mm OD (20 Pieces)

Color

RoHS

REACH

Magnetic Properties

May Be Mildly Magnetic

Minimum Hardness

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Compliant

Exempt

Thrust Load Capacity

Less than 10,000 lbf

10,000 lbf to 19,999 lbf

20,000 lbf to 99,999 lbf

100,000 lbf to 199,999 lbf

Not Rated

Passivation

Passivated

Unpassivated

Side-Mount Retaining Ring Style

Length

Height

Minimum Installation Depth

563 Products

External Retaining Rings

Side-Mount External Retaining Rings

Also known as E-style rings.

Heavy Duty Side-Mount External Retaining Rings

These rings are reinforced to withstand faster rotation than other side‐mount retaining rings. Also known as reinforced E‐style rings.

Low-Clearance Side-Mount External Retaining Rings

Also known as C-style and crescent rings, these rings have a small shoulder to fit in tight spaces.

External Retaining Rings

Open these rings, pass them over the end of a shaft, and release to spring into the groove.

Heavy Duty External Retaining Rings

Thicker than standard external retaining rings, these rings withstand greater force.

Self-Locking External Retaining Rings

No groove is required for these rings—their thick profile helps them grip the shaft.

Inverted External Retaining Rings

For a smooth profile and better clearance than standard external retaining rings, the lugs on these rings point inward.

Push-On External Retaining Rings

No groove required—press these rings onto the end of a shaft for a firm grip.

Heavy Duty Spiral External Retaining Rings

Thicker than standard spiral rings, these rings withstand greater forces.

Single-Turn Spiral External Retaining Rings

Slide these rings into place with one twist—no tools required—for applications with high thrust loads.

Spiral External Retaining Rings

These coiled rings can be wound into place on a shaft without tools.

Clip-On External Retaining Rings

Slide these rings into a groove near the end of the shaft and the tab locks them in place.

Speared Ends External Retaining Rings

Often used with small engines, heavy equipment, and power transmission, these external retaining rings have speared ends to help you install and remove them.

Retaining Ring Assortments

Side-Mount External Retaining Ring Assortments

Also known as E-Style and C-style rings, slide these into the groove from the side of the shaft. They provide a wider shoulder than other external retaining rings for a larger retaining surface.

External Retaining Ring Assortments

Pull these rings open with retaining ring pliers, pass over the end of a shaft, and release to spring into a groove.

External, Internal, and Side-Mount
Retaining Ring Assortments

These assortments include pliers to install external and internal rings.

External Retaining Rings

Side-Mount External Retaining Rings

Heavy Duty Side-Mount External Retaining Rings

Low-Clearance Side-Mount External Retaining Rings

External Retaining Rings

Heavy Duty External Retaining Rings

Self-Locking External Retaining Rings

Inverted External Retaining Rings

Push-On External Retaining Rings

Heavy Duty Spiral External Retaining Rings

Single-Turn Spiral External Retaining Rings

Spiral External Retaining Rings

Clip-On External Retaining Rings

Speared Ends External Retaining Rings

Retaining Ring Assortments

Side-Mount External Retaining Ring Assortments

External Retaining Ring Assortments

External, Internal, and Side-MountRetaining Ring Assortments

External, Internal, and Side-Mount
Retaining Ring Assortments