About O-Ring Size Finder
O-Ring Size Finder is an independent reference and engineering utility site focused on O-ring dimensions, standards, cross-reference and preliminary geometry checks.
What we provide
Size tables, dimensional lookup, standard cross-reference, measurement guidance and browser-based calculation tools for O-ring identification and preliminary design review.
How we handle data
Standard data is kept separate from dimensional estimates. Where a cross-reference has not been independently verified, the result is labelled as a closest dimensional match rather than an equivalent part.
Engineering limitations
O-ring suitability depends on material, hardness, pressure, temperature, tolerances, clearance, lubrication, motion and gland geometry. The calculators on this site are reference tools and do not replace an applicable standard or manufacturer design data.
Independent reference
This site is not affiliated with SAE International, ISO, JSA, Parker or any other standards organization or O-ring manufacturer unless explicitly stated on a page.