Rubber O-Rings | McMaster-Carr

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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2B999

EAR99

DFARS Specialty Metals

16,494 Products

Sealing

O-Rings

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

13,372 products

Backup Rings

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

191 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

189 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 products

Piston Seals

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

57 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

50 products

Head Seals

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

10 products

Cushioning Seals

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

5 products

Buffering Seals

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

22 products

Cord Stock

Cut to length to create customized seals

671 products

Hose Washers

Place inside nozzles and spigots to prevent leaks in an attached hose

12 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

237 products

Manway Gaskets

Create a tight seal between the nozzle and lid of tank car manways

4 products

Boiler Gaskets

Resist heat and steam to form a leak-resistant seal around closures on boilers

41 products

O-Ring Bonding Kits

Everything needed to make O-rings

36 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

572 products

Raw Materials

Foam

Pockets of air make it lighter in weight than rubber; good for packing, insulating, and sealing

21 products

Power Transmission

Round Belts

Flexible to send rotary power between unparallel shafts

291 products

Compressed Air Filter Seals

Replace O-rings in compressed air filters

23 products

Fluid Handling

Tube Fitting Rings

Snap onto push-to-connect fittings to identify different tubing lines

33 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products

Facility and Grounds Maintenance

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

2 products