Crescent Rings | McMaster-Carr

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System of Measurement

Retaining Ring Type

Groove Diameter

Retaining Ring Style

Material

Ring OD

Ring Thickness

Groove Width

Ring ID

Finish

Zinc Yellow-Chromate Plated

Magnetic Properties

Magnetic

May Be Mildly Magnetic

Nonmagnetic

Thrust Load Capacity

Less than 10,000 lbf

10,000 lbf to 19,999 lbf

20,000 lbf to 29,999 lbf

30,000 lbf to 39,999 lbf

40,000 lbf or greater

REACH

Compliant

RoHS

Compliant

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Export Control Classification Number (ECCN)

Minimum Hardness

Specifications Met

Passivation

For Rings That Fit OD

Side Mount Retaining Ring Style

Handle Style

Overall Length

Container Features

955 Products

Fasteners

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.

Side-Mount External Retaining Rings

Also known as E-style rings.

Bowed Side-Mount External Retaining Rings

Also known as bowed E-style rings, these have a curved design that works like a spring, taking up play for a tight hold.

Wide-Grip Side-Mount External Retaining Rings

Also known as poodle rings, these thick rings have "ears" that form a large retaining surface to withstand stronger forces than other side-mount retaining 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.

Heavy Duty Spiral External Retaining Rings

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

Spiral External Retaining Rings

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

Single-Turn Spiral External Retaining Rings

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

Spiral Internal Retaining Rings

These coiled rings can be wound into place inside a bore or housing without tools.

Heavy Duty Spiral Internal Retaining Rings

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

Single-Turn Spiral Internal Retaining Rings

Slide these rings into place by hand with a single twist for applications with high thrust loads.

External and Internal Spiral
Retaining Ring Assortments

Wind these retaining rings into a groove—no tools required for installation.

Side-Mount Retaining Ring Tools

E-Style Side-Mount Retaining Ring Installation Tools

Slide the retaining ring in between the jaws of the tool and push the ring onto a shaft.

E- and C-Style Side-Mount Retaining
Ring Installation and Removal Tools

The spring on one end of the tool holds the retaining ring in position for installation and the hook on the other end is for removal.

Fasteners

Low-Clearance Side-Mount External Retaining Rings

Side-Mount External Retaining Rings

Bowed Side-Mount External Retaining Rings

Wide-Grip Side-Mount External Retaining Rings

Heavy Duty Side-Mount External Retaining Rings

Heavy Duty Spiral External Retaining Rings

Spiral External Retaining Rings

Single-Turn Spiral External Retaining Rings

Spiral Internal Retaining Rings

Heavy Duty Spiral Internal Retaining Rings

Single-Turn Spiral Internal Retaining Rings

External and Internal SpiralRetaining Ring Assortments

Side-Mount Retaining Ring Tools

E-Style Side-Mount Retaining Ring Installation Tools

E- and C-Style Side-Mount RetainingRing Installation and Removal Tools

External and Internal Spiral
Retaining Ring Assortments

E- and C-Style Side-Mount Retaining
Ring Installation and Removal Tools