Is this an official NOK website?
This is an independent engineering reference. O Ring Design is not affiliated with, authorized by or endorsed by NOK.
Independent engineering reference
NOK O-Ring Engineering Guide
Use official NOK product data together with independent size, groove and tolerance checks.
NOK is a Japanese sealing manufacturer whose O-ring catalogue covers JIS P/G/V, ISO-equivalent, automotive and AS568-related families.
This is an independent engineering reference. O Ring Design is not affiliated with, authorized by or endorsed by NOK.
Engineering focus
- • JIS B 2401 P, G and V series
- • Automotive and industrial compounds
- • Japanese material development
Size and part-number context
Keep NOK series names and part references beside the underlying JIS, ISO or AS size basis so teams can identify both geometry and source.
Material and compound context
Select by the exact NOK material designation and application class rather than assuming every NBR or FKM grade performs identically.
Use this brand data in a design review
- 1Identify the exact supplier part number, standard designation, material code and hardness.
- 2Enter the verified ID, cross-section and tolerances in the seal-specific calculator.
- 3Check squeeze, stretch, gland fill and extrusion without changing limits because of the brand.
- 4Confirm availability, certification and final compound data with the manufacturer or an authorized source.
Engineering independence
Supplier badges and partnership visibility are commercial disclosures only. They do not change dimensional closeness, engineering ranking, active criteria or qualification verdicts.
Frequently asked questions
Does the brand change the calculation verdict?
Supplier badges and partnership visibility are commercial disclosures only. They do not change dimensional closeness, engineering ranking, active criteria or qualification verdicts.