Precision for reliable sealing

O-rings are critical sealing elements in countless applications – from the automotive industry to machinery engineering. Their performance depends heavily on precisely maintained dimensional tolerances. Even the smallest deviations can affect sealing performance and lead to leaks or increased wear over time.

The ISO 3601-1 standard defines globally recognized requirements for O-ring dimensions and tolerances. Class B in particular provides a proven standard for industrial applications where a balanced compromise between manufacturing effort and functionality is required.

When combined with the material designation “N”, tolerances for cross-section and inner diameter are clearly defined, providing a reliable foundation for design, selection, and quality assurance.