Dash Number 122 O-Rings | McMaster-Carr

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31 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.

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

These O-rings have eight points of contact for a better seal in dynamic applications than X-profile O-rings, plus they have eight grooves that hold lubricant to reduce friction and wear for 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 Clean Room Buna-N O-Rings

These Buna-N O-rings are made and bagged in an ISO Class 7 (Fed. Std. 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.

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
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 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 Kalrez 4079 O-Rings

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

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 -75° 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 Silicone O-Rings

These silicone O-rings withstand temperatures up to 400° F or 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.

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.