O-Ring Seals | McMaster-Carr

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16,331 Products

Sealing

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

13,776 products

Backup Rings

Extend the life of O-rings and improve their performance under high pressure

263 products

O-Ring Bonding Kits

Everything needed to make O-rings

7 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

533 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

Packing Seals

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

17 products

Piston Seals

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

57 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

50 products

Spring-Loaded Seals

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

54 products

Buffering Seals

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

22 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

Wear Rings

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

54 products

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 Repair Sleeves

Cover worn shafts with a smooth and protective sealing surface without machining

21 products

Cord Stock

Cut to length to create customized seals

295 products

Drain Gaskets

Create a watertight seal between your drain and fixture without the mess of plumber's putty

3 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

752 products

Power Transmission

Compressed Air Filter Seals

Replace O-rings in compressed air filters

23 products

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

36 products

Cylinder Rod Glands

Replace the rod gland on hydraulic cylinders

13 products

Measuring and Inspecting

O-Ring Gauges

Identify the size of your O-ring

4 products

Fluid Handling

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

6 products

Facility and Grounds Maintenance

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

6 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products