O-Rings — reference & enquiry
Every major o-ring standard.
Elastomer picking.
Chemical compatibility.
A working reference for engineers specifying o-rings — 2,611 sizes across nine international standards, 21 elastomers with temperature and chemical profiles, and a 1,099-row compatibility matrix. Add sizes as you browse and we’ll quote them in your currency.
2,611 rows
Sizes
Filter by standard, inside diameter and cross-section. mm / inch toggle. Add rows to an enquiry.
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21 elastomers
Materials
NBR, HNBR, EPDM, FKM, FFKM, VMQ, FVMQ, urethanes and more — temperature range and application notes.
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NOK JIS B 2401
Japanese
Dedicated NOK section — JIS P / G / S / SS / V series, AS568, WEX, BE, Iron Rubber and SP-coated o-rings. Full catalogue PDF.
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1,099 chemicals
Compatibility
Search a chemical, see rated volume-swell behaviour across every common elastomer.
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Enquiry
Send the sizes you need and tell us the elastomer, quantity and delivery country.
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Standards covered
AS568
SAE Aerospace Size Standard for O-Rings. The most commonly used o-ring standard in the US across aerospace, automotive and general industry.
ISO 3601 G
ISO 3601-1 General-purpose sizes. International standard, metric.
ISO 3601 A
ISO 3601-1 Aerospace sizes with tighter tolerances.
DIN 3771
German Institute for Standardization o-ring dimensions. Very similar to ISO 3601, uses grade specification (N / S) rather than application type.
BS 4518
British Standard metric o-ring dimensions.
BS 1806
British Standard imperial o-ring dimensions. Widely used across UK fluid-power equipment.
JIS B 2401
Japanese Industrial Standard covering P (motion), G (fixed), V (vacuum) and S (fixed) o-rings.
NF T47-501 G
French standard, general-purpose sizes.
NF T47-501 A
French standard, aerospace sizes.