O-ring Size Chart

Parco's O-ring Size Chart describes the standard O-ring sizes used by Parco and the O-ring industry in the United States as defined by Aerospace Standard AS568B, Aerospace Size Standard for O-rings, and the Society of Automotive Engineers, Inc. (SAE). Those standard sizes are also used for most military specifications.

Parco offers O-rings in all 369 standard sizes, including 20 sizes for boss seals listed under the 900 series. If you need O-rings in a non-standard size, Parco has hundreds of molds for non-standard sizes. If a mold is not available, we can make one for you.

            Standard O-ring Size Chart

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