O-Ring Size Chart — All Standards

Use the interactive configurator below to look up O-Ring dimensions across AS568 (imperial), Metric/ISO 3601, BS 4518, GB/T 3452.1 and JIS B2401 (P/G/S/V) standards. Select your standard, cross-section and inside diameter — Outside Diameter (OD = ID + 2×CS) is calculated automatically.

Select a standard and cross-section from the dropdowns above to browse sizes. All dimensions in millimetres.

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Available Compounds

NBR 70/90FKM 75/90FFKM EPDMHNBR 70/80/90Silicone FluorosiliconeAFLASNeoprene

Standards Cross-Reference

AS568 Metric ISO 3601 JIS B2401 Custom

Material Technical Guides

NBR FKM EPDM FFKM HNBR Silicone

Standard Size Configurator

1. Standard 2. Cross-section (CS) 3. Size (dash number / ID) 4. Material

Standard—

Dash / Ref—

Cross-Section—

Inside Diameter—

Outside Diameter—

Material—

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Custom / Non-Standard Size

Enter your exact dimensions

Enter any ID and CS in mm — we'll calculate OD and confirm tooling availability.

ID (mm)

CS (mm)

Material

Inside Diameter—

Cross-Section—

Outside Diameter—

Material—

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