O-Ring Dimensions & Data

O rings are used to block a path which may otherwise allow a liquid or a gas to escape. The o ring is placed into a groove to secure them in place, and then compressed between two surfaces. By squeezing the o ring, there is no more clearance for it to move and it blocks the pathway of the liquid or gas you are trying to seal in place.

When the system comes under pressure, the o ring is squeezed against the opposite wall of the groove, maintaining a perfect seal even under very high or low pressures. The materials that o rings are made from (elastomers) are naturally springy and have a desire to return to their original shape, so when the pressure ceases, they spring back to their original position, maintaining a seal and in readiness for the next cycle.

Dimensional Charts relating to ISO 3601, DIN 3771,BS500-800, BS4518 and SAE AS568 O-Rings.

Dimensions shown are in mm and Inches, please use our universal converter to convert to the opposite unit.

O-RING DIMENSIONS - ISO 3601