Shrinkage Size Adjustment

It is important to note that ALL O-ring materials shrink to some extent during molding. Over time, certain O-ring materials have been identified as possessing similar shrink rates, and are therefore used as O-ring size standards. The nominal O-ring sizes listed in this catalog are based upon a 70 Durometer Nitrile. For O-ring materials other than 70 Durometer Nitrile, please contact Apple Rubber, as extensive tooling is available for high shrink compounds.