Crescent Rings | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For OD For OD

	Retaining Ring Style Retaining Ring Style


Side Mount	Push On

Spiral

	Material Material

	Finish Finish

Black Phosphate

Zinc Yellow-Chromate Plated

Zinc Plated

Black Oxide

Corrosion-Resistant-Coated

Nickel Plated

	For Groove Diameter For Groove Diameter

	Retaining Ring Type Retaining Ring Type

	External
	Internal

	Ring OD Ring OD

	Ring Thickness Ring Thickness

	For Groove Width For Groove Width

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Magnetic Properties Magnetic Properties

Magnetic

May Be Mildly Magnetic

	Minimum Hardness Minimum Hardness

	For ID For ID

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Thrust Load Capacity Thrust Load Capacity

Less than 1,000 lbs.

1,000 to 1,999 lbs.

2,000 to 9,999 lbs.

10,000 to 19,999 lbs.

20,000 lbs. or greater

	Passivation Passivation

Passivated

Not Passivated

	Specifications Met Specifications Met

ASME

DIN

	Height Height

	Ring ID Ring ID

	Minimum Installation Depth Minimum Installation Depth

	Thread Size Thread Size

435 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.

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.

Push-On External Retaining Rings

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

Push-On Retaining Caps

Use these caps to hold components in place and protect shaft ends.

Rectangular Push-On External Retaining Rings

Also known as flat-style speed nuts, these have a large surface to distribute loads better than standard and flanged external push rings.

Single-Turn Spiral External Retaining Rings

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

Push-On Internal Retaining Rings

No groove required—these rings have teeth that firmly grip the bore.

Single-Turn Spiral Internal Retaining Rings

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

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.

Rectangular Push Nuts for Tapping Screws

Rectangular Push Nuts

Also known as flat-style speed nuts, these have large sides, so they're easy to push over threads by hand.

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Fasteners

Low-Clearance Side-Mount External Retaining Rings

Side-Mount External Retaining Rings

Wide-Grip Side-Mount External Retaining Rings

Push-On External Retaining Rings

Push-On Retaining Caps

Rectangular Push-On External Retaining Rings

Single-Turn Spiral External Retaining Rings

Push-On Internal Retaining Rings

Single-Turn Spiral Internal Retaining Rings

Side-Mount External Retaining Ring Assortments

Rectangular Push Nuts for Tapping Screws

Rectangular Push Nuts

Socket Retaining Rings

Two-Piece Socket Retaining Rings

One-Piece Socket Retaining Rings