Hydraulic Seals | McMaster-Carr

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System of Measurement

ID

Width

Seal ID

OD

Seal OD

Cross Section Shape

Material

Molybdenum Disulfide

Silicon Carbide

Stainless Steel

Seal Width

For Use With

Diluted Salt Solutions

Fluorinated Solvents

Synthetic Lubricants

Transmission Fluid

Dash Number

Color

Hardness Rating

Maximum Temperature

Less than 250° F

250° F to 299° F

300° F to 399° F

400° F to 499° F

500° F or greater

Rod Diameter

Bore Diameter

Core Material

Shaft Diameter

For Cylinder Type

Minimum Temperature

-250° F or less

-249° F to -100° F

-99° F to -50° F

-49° F to -1° F

Greater than 0° F

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

RoHS

REACH

Export Control Classification Number (ECCN)

DFARS Specialty Metals

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10,777 Products

Sealing

U-Cup Seals

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

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

Piston Seals

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

Wear Rings

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

Packing Seals

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

Head Seals

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

Buffering Seals

Buffering Seals

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

Spring-Loaded Seals

Spring-Loaded Seals

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

Wear Ring Stock

Wear Ring Stock

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

O-Rings

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

Cord Stock

Cut to length to create customized seals

Power Transmission

Hydraulic Cylinder Seals

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

Cylinder Rod Glands

Cylinder Rod Glands

Replace the rod gland on hydraulic cylinders

Fluid Handling

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)