Place the o ring into a vernier caliper.
O ring gauge chart.
The standard sizes used by o ring manufacturers in the united states are defined by aerospace standard as568b aerospace size standard for o rings.
Record the thickness of the ring the cross section see image for reference.
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The seal material under mechanical pressure extrudes into the microfi ne grooves of the gland.
Metric and inch cross section thickness reference gauge.
Lightly clamp the jaws of the caliper onto the o ring but do not compress it.
That document published by the society of automotive engineers sae lists the sizes of o rings in six series or groups in both inches and millimeters.
Shop our selection of popular brand o rings like alfas buna epr viton and more.
Quick reference tape measure confirms metric size o rings 64mm 665mm inside diameter on one side and usa as568 standard o ring sizes from 2 5 id to 26 inside diameter on the other side.
Note that the o ring has been.
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O ring is mechanically squeezed out of round between the outer and inner members to close the fl uid passage.