McMaster-Carr

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	Cross Section Shape Cross Section Shape


Round	Square

Rectangle	X

	System of Measurement System of Measurement

Inch

	Width Width

0.086"

0.103"

	Fractional Width Fractional Width

3/32

	ID ID

0.987"

1.018"

1.020"

	OD OD

1.192"

1.193"

	Dash Number Dash Number	Show

120

	Dash Number Dash Number	Hide

001
001-1/2
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901
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928
932

	Material Material

Rubber

Plastic

	Color Color

	Black		Red
	White		Brown
	Clear		Blue
	Cream

	Hardness Hardness

	Fractional ID Fractional ID

	For Use With For Use With

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	Fractional OD Fractional OD

1 3/16

	Specifications Met Specifications Met

3-A Sanitary Certified

ASTM

FDA Compliant

Mil. Spec.

SAE

USP

	Environment Environment

Food Industry

Clean Room

Sanitary

	Construction Construction

Solid

Split

	Top Shape Top Shape

Contoured

Flat

	Minimum Thickness Minimum Thickness

0.049"

0.053"

	Grade Grade

	Core Color Core Color

	Red
	Black

	Core Hardness Core Hardness

Durometer 70A

Durometer 75A

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38 Products

About O-Rings

Oil-Resistant Buna-N O-Rings

Made of Buna-N, these O-rings resist grease, hydraulic oil, and motor oil—plus mild chemicals and water.

Oil-Resistant Soft Buna-N O-Rings

Softer than standard Buna-N O-rings for a better seal in low-pressure applications.

Oil-Resistant Hard Buna-N O-Rings

These hard O-rings offer better wear resistance than standard Buna-N O-rings.

Square-Profile Oil-Resistant
Buna-N O-Rings

With flat edges on all four sides, square-profile O-rings cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

X-Profile Oil-Resistant
Buna-N O-Rings

Also known as Quattro Seals and X-rings, these X-profile O-rings have four points of contact for a better seal in dynamic applications than round-profile O-rings. They also require less compression to make a seal, so they offer a longer service life.

Oil-Resistant Mil.
Spec. Buna-N O-Rings

Choose these O-rings for their adherence to strict military standards for material and construction.

Oil-Resistant Food
Industry Buna-N O-Rings

These Buna-N O-rings are made of FDA-listed material for use with food and beverage.

Oil-Resistant Clean
Room Buna-N O-Rings

These Buna-N O-rings are made and bagged in an ISO Class 7 (10,000) clean room.

Oil- and Abrasion-Resistant
Polyurethane O-Rings

More abrasion resistant than Buna-N O-rings, these also resist mineral oil and motor oil.

Ultra-Strength
Oil- and
Abrasion-Resistant
Polyurethane O-Rings

These O-rings are harder and stronger than standard polyurethane O-rings to handle high-pressure applications.

Chemical-Resistant O-Rings

Chemical-Resistant Viton®
Fluoroelastomer O-Rings

These Viton® fluoroelastomer O-rings resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol.

Chemical-Resistant Soft Viton®
Fluoroelastomer O-Rings

Softer than standard Viton® fluoroelastomer O-rings, these offer a better seal in low-pressure applications.

Chemical-Resistant Hard Viton®
Fluoroelastomer O-Rings

These hard O-rings offer better wear resistance than standard Viton® fluoroelastomer O-rings.

Square-Profile Chemical-Resistant
Viton® Fluoroelastomer O-Rings

With flat edges on all four sides, these square-profile O-rings cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

X-Profile Chemical-Resistant
Viton® Fluoroelastomer O-Rings

Chemical-Resistant Super-Resilient
Viton® Fluoroelastomer O-Rings

These durable O-rings bounce back to shape after repeated compression better than other types of Viton® fluoroelastomer O-rings.

Chemical-Resistant Brown
Viton® Fluoroelastomer O-Rings

Because one black O-ring looks just like another, these O-rings are brown for easy identification.

Chemical-Resistant Mil. Spec.
Viton® Fluoroelastomer O-Rings

All of these O-rings meet MIL-R-83248C.

Chemical- and Steam-Resistant
Viton® Fluoroelastomer O-Rings

In addition to resisting chemicals, such as benzene, butyl alcohol, and ethylene glycol, these Viton® fluoroelastomer ETP O-rings resist steam.

Ultra-Chemical-Resistant
Rigid PTFE O-Rings

Rigid and hard with a slippery surface, these PTFE O-rings resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and boric acid.

Ultra-Chemical-Resistant
FEP-Encapsulated Silicone O-Rings

The FEP casing on these O-rings provides the same level of resistance to harsh chemicals as PTFE O-rings, but the core material is soft to make these O-rings more compressible.

Ultra-Chemical-Resistant
FEP-Encapsulated
Viton® Fluoroelastomer O-Rings

Unlike silicone, the Viton® fluoroelastomer core will continue to ward of chemicals should the FEP casing wear away.

Ultra-Chemical-Resistant
Kalrez 4079 O-Rings

Inherently softer and more compressible than PTFE O-rings, these Kalrez 4079 O-rings have comparable chemical resistance.

Ultra-Chemical- and Steam-Resistant
Kalrez 6375 O-Rings

Kalrez 6375 O-rings are preferred over Kalrez 4079 for chemical-processing environments and applications involving steam.

Ultra-Chemical-Resistant
High-Purity Kalrez 6230 O-Rings

Made of Kalrez 6230, these O-rings are for use when high purity is essential, such as with food and semiconductors.

Chemical-Resistant Low-Temperature
Fluorosilicone O-Rings

These fluorosilicone O-rings remain flexible at temperatures as low as -80° F. They resist ethanol, ethylene glycol, and isopropyl alcohol.

Ultra-Chemical-Resistant
Aflas O-Rings

While these Aflas O-rings are commonly used with petroleum fluids, they also resist many chemicals, such as ammonia, calcium hydroxide, and acetic, boric, and phosphoric acids.

High-Temperature O-Rings

High-Temperature Silicone O-Rings

These O-rings withstand temperatures up to 450° F.

High-Temperature
Soft Silicone O-Rings

Able to withstand temperatures up to 400° F, these O-rings are softer than standard silicone O-rings for a better seal in low-pressure applications.

Square-Profile High-Temperature
Silicone O-Rings

These square-profile O-rings have flat edges on all four sides, so they cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

High-Temperature
High-Purity Silicone O-Rings

Water- and Steam-Resistant O-Rings

Water- and Steam-Resistant
EPDM O-Rings

These O-rings also resist ethanol and ethylene glycol.

Water- and Steam-Resistant
High-Temperature EPDM O-Rings

These O-rings withstand higher temperatures than standard EPDM O-rings.

Water-Resistant Neoprene O-Rings

These O-rings also resist ammonia, ethylene glycol, and isopropyl alcohol.

O-Ring Backup Rings

Oil-Resistant Buna-N Backup Rings

Made of Buna-N, these backup rings resist grease, petroleum fluids, and motor oil.

Ultra-Chemical-Resistant
PTFE Backup Rings

These PTFE backup rings resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and many acids.

Terms and Conditions and Privacy Policy

About O-Rings

Oil-Resistant O-Rings

Oil-Resistant Buna-N O-Rings

Oil-Resistant Soft Buna-N O-Rings

Oil-Resistant Hard Buna-N O-Rings

Square-Profile Oil-ResistantBuna-N O-Rings

X-Profile Oil-ResistantBuna-N O-Rings

Oil-Resistant Mil.Spec. Buna-N O-Rings

Oil-Resistant FoodIndustry Buna-N O-Rings

Oil-Resistant CleanRoom Buna-N O-Rings

Oil- and Abrasion-ResistantPolyurethane O-Rings

Ultra-StrengthOil- and Abrasion-Resistant Polyurethane O-Rings

Chemical-Resistant O-Rings

Chemical-Resistant Viton®Fluoroelastomer O-Rings

Chemical-Resistant Soft Viton®Fluoroelastomer O-Rings

Chemical-Resistant Hard Viton®Fluoroelastomer O-Rings

Square-Profile Chemical-ResistantViton® Fluoroelastomer O-Rings

X-Profile Chemical-ResistantViton® Fluoroelastomer O-Rings

Chemical-Resistant Super-ResilientViton® Fluoroelastomer O-Rings

Chemical-Resistant BrownViton® Fluoroelastomer O-Rings

Chemical-Resistant Mil. Spec.Viton® Fluoroelastomer O-Rings

Chemical- and Steam-ResistantViton® Fluoroelastomer O-Rings

Ultra-Chemical-ResistantRigid PTFE O-Rings

Ultra-Chemical-ResistantFEP-Encapsulated Silicone O-Rings

Ultra-Chemical-ResistantFEP-Encapsulated Viton® Fluoroelastomer O-Rings

Ultra-Chemical-ResistantKalrez 4079 O-Rings

Ultra-Chemical- and Steam-ResistantKalrez 6375 O-Rings

Ultra-Chemical-ResistantHigh-Purity Kalrez 6230 O-Rings

Chemical-Resistant Low-TemperatureFluorosilicone O-Rings

Ultra-Chemical-ResistantAflas O-Rings