High Temperature O-rings | McMaster-Carr

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High-Temperature O-Rings

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.

High-Temperature High-Purity Silicone O-Rings
for Tube Fittings with Straight-Thread Connection

Also known as Boss O-rings, these O-rings are for use in tube fittings with a straight-thread connection.

High-Temperature Clean Room Silicone O-Rings

Made and bagged in an ISO Class 7 (Fed. Std. Class 10,000) clean room, these are the highest purity high-temperature O-rings we offer.

High-Temperature
Metal-Detectable Silicone O-Rings

If these O-rings deteriorate, they can be picked up by metal detection systems.

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