International O-Ring Cross Reference

Metric O-Ring Size Cross Reference Table

This chart shows all of the common international size standards and allows you to cross reference with other standards. Please note that no tolerances or materials are taken into consideration in this cross-reference chart.

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International O-Ring Cross Reference

Part #
CS mm
I.D. mm
AS568
BS 1806
Generic
2.40X021.6
2.4
21.6
2.40X021.8
2.4
21.8
2.40X022.3
2.4
22.3
2.40X023.3
2.4
23.3
2.40X024.6
2.4
24.6
2.40X025.3
2.4
25.3
2.40X027.3
2.4
27.3
2.40X027.6
2.4
27.6
2.40X029.6
2.4
29.6
2.40X030.3
2.4
30.3
2.40X031.6
2.4
31.6
2.40X033.3
2.4
33.3
2.00X129.5
2
129.5
2x129.5
2.00X130
2
130
2x130
2.00X131.5
2
131.5
2x131.5
2.00X134.5
2
134.5
2x134.5
2.00X135
2
135
2x135
2.00X136
2
136
2x136
2.00X139.5
2
139.5
2x139.5
2.00X140
2
140
2x140
2.00X143
2
143
2x143
2.00X144.5
2
144.5
2x144.5
2.00X146
2
146
2x146
2.00X149.5
2
149.5
2x149.5
2.00X155
2
155
2x155
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