Buna-N Rubber Gaskets | McMaster-Carr

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Material

O-Ring Material

Shape

Ring with Bolt Holes

System of Measurement

Thickness

0.021" to 0.041"

0.026" to 0.036"

0.052" to 0.072"

0.054" to 0.070"

0.115" to 0.135"

Pipe Size

Color

For Flange ANSI Class

Backing Type

OD

ID

Maximum Temperature

Less than 500° F

500° F to 999° F

Number of Bolt Holes

For Use With

Diluted Salt Solutions

Synthetic Lubricants

Transmission Fluid

Acetic Acid (White Vinegar)

Ammonium Hydroxide

Width

Maximum Pressure

Less than 1,000 psi

1,000 psi to 1,999 psi

2,000 psi to 2,999 psi

3,000 psi to 9,999 psi

10,000 psi or greater

Length

Hardness Rating

Minimum Temperature

-199° F to -100° F

-99° F to 0° F

Greater than 0° F

DFARS Specialty Metals

Diameter

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

Hardness

Grip Material

How can we improve?

857 Products

Sealing

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

Gasket Material

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

Made-to-Order Gaskets

Made-to-Order Gaskets

Send your exact specifications to get gaskets that fit precisely between surfaces

Edge Seals

Block dust, water, and wind from entering the gaps around doors and windows

U-Cup Seals

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

Piston Seals

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

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

Buffering Seals

Buffering Seals

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

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

Fluid Handling

Tube Fitting Rings

Tube Fitting Rings

Prevent leaks at tubing connection points

Raw Materials

Foam

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

Rubber

Compresses and bounces back to shape; often used for sealing, cushioning, and shock absorbing

Fastening and Joining

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Heating, Ventilation, and Air Conditioning

Pipe Insulation

Pipe Insulation

Fit around pipe, tubing, and tanks to reduce heat loss or condensation

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