Air O-Rings | McMaster-Carr

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309 Products

About O-Rings

Easy-Install Oil-Resistant Buna-N O-Rings

A slick surface treatment makes these O-rings easy to seat without tearing or rolling. The lack of friction also helps create a long-lasting seal in dynamic applications, no lubrication required.

Weather- and Oil-Resistant HNBR O-Rings

A step up from Buna-N, these HNBR O-rings contain extra hydrogen to better resist chemicals, weather, and abrasion.

Weather- and Oil-Resistant
HNBR O-Ring Assortments

Keep a variety of sizes handy so that you always have the O-ring you need. The HNBR O-rings in these assortments are a step up from Buna-N O-rings—they contain extra hydrogen to better resist chemicals, weather, and abrasion.

Tubing and Tube Fittings

Rings for Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Use these rings with quick-clamp high-vacuum fittings.

Rings for Claw-Clamp and Bolt-Together
High-Vacuum Fittings for Stainless Steel Tubing

Create airtight seals in high-vacuum systems by placing these rings between two claw-clamp (ISO-K) or bolt-together (ISO-F) fittings.

Rings for Quick-Clamp High-Vacuum
Fittings for Aluminum Tubing

Create an airtight seal between quick-clamp (ISO-KF) fittings—these rings complete high-vacuum connections.

O-Rings for Brass Compression
Tube Fittings for Air and Water

Use these O-rings with brass compression tube fittings that have BSPP male threads. They create a seal on the BSPP male threads to guard against leaks.

About O-Rings

O-Rings

Easy-Install Oil-Resistant Buna-N O-Rings

Weather- and Oil-Resistant HNBR O-Rings

Weather- and Oil-ResistantHNBR O-Ring Assortments

Tubing and Tube Fittings

Rings for Quick-Clamp High-VacuumFittings for Stainless Steel Tubing

Rings for Claw-Clamp and Bolt-TogetherHigh-Vacuum Fittings for Stainless Steel Tubing

Rings for Quick-Clamp High-VacuumFittings for Aluminum Tubing

O-Rings for Brass CompressionTube Fittings for Air and Water

Weather- and Oil-Resistant
HNBR O-Ring Assortments

Rings for Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Rings for Claw-Clamp and Bolt-Together
High-Vacuum Fittings for Stainless Steel Tubing

Rings for Quick-Clamp High-Vacuum
Fittings for Aluminum Tubing

O-Rings for Brass Compression
Tube Fittings for Air and Water