Round Rings | McMaster-Carr

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Corrosion-Resistant Coated

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For Use With

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Brake Fluid

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3,978 Products

Material Handling

Chain Rings

Join chains and add connectors for binding, towing, and lifting

134 products

Webbing Rings

Add looped connection spots

63 products

Fastening and Joining

Retaining Rings

Hold components on a shaft

2,361 products

Split Rings

Secure clevis pins, connect components, or add a pull handle; also known as key rings

67 products

Cotter Pins

Secure the ends of clevis pins and shafts to keep components in place

8 products

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

48 products

Clinch Clips

Squeeze closed to connect wire mesh panels and secure fencing

4 products

Socket Retaining Rings

Secure sockets and adapters to impact tools

39 products

Facility and Grounds Maintenance

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

6 products

Sealing

Wear Ring Stock

Cut to make wear rings that fit any rod or bore to prevent uneven wear and extend the life of seals

12 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

533 products

Wear Rings

Guide rods and pistons to prevent uneven wear and extend the life of seals

54 products

U-Cup Seals

With a lip on both the inside and outside edges, they can be used for sealing rods and pistons

198 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

50 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 products

Spring-Loaded Seals

Seal rods and pistons with a wider range of temperature and chemical resistance than U-cup seals

54 products

Piston Seals

Prevent leaks inside pistons by creating a seal against the cylinder bore

57 products

Cushioning Seals

Reduce wear and noise in air-powered cylinders by blocking the piston from hitting the cylinder body

5 products

Head Seals

Maintain a seal even under fluctuating pressure; more reliable than an O-ring with a backup ring

10 products

Packing Seals

Fill in gaps around pump shafts, valve stems, and agitators to prevent leaks

47 products

Buffering Seals

Protect hydraulic cylinders from pressure spikes and shock in high-pressure applications

22 products

Communication

Tag Rings

Loop onto tags to attach them to lanyards, key rings, and other objects

72 products

Power Transmission

Flexible Shaft Couplings

Connect two shafts that are misaligned to transfer rotary motion from one to the other

7 products

Building and Machinery Hardware

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

25 products