Piston Gaskets | McMaster-Carr

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DFARS Specialty Metals

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375 Products

U-Cup Seals

O-Ring-Loaded U-Cup Seals

O-Ring-Loaded U-Cup Seals

An O-ring forms a better seal at lower pressures than unsupported U-cups
Also known as PolyPaks

High-Stability O-Ring-Loaded U-Cup Seals

High-Stability O-Ring-Loaded U-Cup Seals

Wider than our other O-ring-loaded U-cups for improved stability
Also known as PolyPaks

High-Pressure U-Cup Seals

High-Pressure U-Cup Seals

Handle over 80 times more pressure than our Buna-N U-cup seals

U-Cup Seals

Create less friction than O-ring-loaded U-cups, so they wear more slowly

Other Products

Piston Seals

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

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

Spring-Loaded Seals

Spring-Loaded Seals

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

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

Hydraulic Cylinder Seals

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

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