Urethane O-Rings | McMaster-Carr

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Material

Polyurethane Rubber

ID

Seal ID

Cross Section Shape

Seal OD

OD

Width

Dash Number

Hardness

Color

Seal Width

For Use With

Diluted Salt Solutions

Synthetic Lubricants

Transmission Fluid

Calcium Hydroxide

Ethylene Glycol

Hardness Rating

System of Measurement

Rod Diameter

Maximum Temperature

Less than 250° F

250° F to 299° F

300° F to 499° F

For Cylinder Type

Fractional ID

Fractional Width

Minimum Temperature

-99° F to -50° F

-49° F to -1° F

Groove Diameter

Bore Diameter

RoHS

DFARS Specialty Metals

Export Control Classification Number (ECCN)

REACH

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951 Products

Sealing

O-Rings

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

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

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

Power Transmission

Round Belts

Flexible to send rotary power between unparallel shafts

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