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Designations

The designations of SKF O-rings (table 1) in both metric and inch sizes contain their dimensions in metric units.
The designations of SKF back-up rings (table 2) in metric sizes contain their dimensions in metric units, whereas those in inch sizes contain their dash-number.
The size lists for both are provided in inch and metric sizes. If applicable the unique dash-numbers for O-ring sizes in accordance with standards AS586:2012 and ISO 3601:2012 are also listed here.
SKF provides O-rings in metric (→ Size list [pdf]) and inch sizes (→ Size list [pdf]).
SKF provides back-up rings in metric sizes (→ Size list [pdf]), inch sizes by dash-number with metric dimensions (→ Size list [pdf]), and inch sizes by dash-number (→ Size list [pdf]).
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