Metric External Retaining Rings | McMaster-Carr

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	For OD For OD

1 to 1.4mm

1.4 to 2mm

2 to 2.5mm

2.5 to 3mm

3 to 4mm

4 to 5 mm

5 to 7 mm

6 to 8 mm

7 to 9mm

8 to 11 mm

9 to 12 mm

10 to 14 mm

11 to 15 mm

13 to 18 mm

16 to 24 mm

20 to 31 mm

25 to 38mm

32 to 42mm

	Retaining Ring Style Retaining Ring Style


Standard	Side Mount

Spiral	Clip On

Constant Section

	For Groove Diameter For Groove Diameter

	Retaining Ring Type Retaining Ring Type

	External
	Internal

	Material Material

Stainless Steel

	Finish Finish

Black Phosphate

Zinc-Chromate Plated

Zinc Yellow-Chromate Plated

	Ring Thickness Ring Thickness

	For Groove Width For Groove Width

	Ring ID Ring ID

	Specifications Met Specifications Met

DIN

	Minimum Hardness Minimum Hardness

	Magnetic Properties Magnetic Properties

May Be Mildly Magnetic

	Thrust Load Capacity Thrust Load Capacity

Less than 10,000 lbs.

10,000 to 19,999 lbs.

20,000 to 29,999 lbs.

30,000 to 99,999 lbs.

100,000 lbs. or greater

	Ring OD Ring OD

	Passivation Passivation

	Number of Pieces Number of Pieces

	Container Features Container Features

	Container Length Container Length

	Container Depth Container Depth

	Container Width Container Width

	Clip Height Clip Height

	Groove to End of Shaft Length Groove to End of Shaft Length

	Width Width

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510 Products

External Retaining Rings

External Retaining Rings

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

Heavy Duty External Retaining Rings

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

Inverted External Retaining Rings

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

Side-Mount External Retaining Rings

Also known as 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.

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.

Single-Turn Spiral
External Retaining Rings

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

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.

Clip-On External Retaining Rings

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

External Retaining Ring Assortments

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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

External, Internal, and Side-Mount Retaining Ring Assortments

These assortments include pliers to install external and internal rings.

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