Cup Seals | McMaster-Carr

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DFARS Specialty Metals

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Rod Seal Material

Rod Gland Material

263 Products

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

80 products

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

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

42 products

High-Pressure U-Cup Seals

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

9 products

U-Cup Seals

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

67 products

Other Products

Piston Seals

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

14 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

15 products