In the U.S., the most common standard sizes of O-Rings are normally referred as “AS568 O-Rings”per the AS568 specification.. These AS568 O-Rings are grouped by cross section;and inner diameter with “Dash Numbers”. View our AS568 Size Chart for a full listing of all sizes and dimensions.
Japanese National Standard is widely applied one for O-Ring as well.
In fluid power systems, power is transmitted through a fluid (liquid or gas) under pressure within an enclosed circuit. Sealing devices are employed to avoid leakage and keep mutual sealing of different chambers.Therefore,as one of sealing devices,O-Ring also needs to followISO3601 which is approved by the ISO/TC131 Technical Committee Fluid Power System.SC7 Sealing Device Subcommittee.
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