An o ring is a loop of elastomer with a round (o-shaped) cross-section used as a mechanical seal or gasket. They are designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.
1. AS-568 standard.
2. Materials: FKM75.
3. In some high temperature applications, o rings may need to be mounted in a tangentially compressed state to compensate for the Gow-Joule effect.