O-Ring Size Charts

O-Ring Size Charts provide a comprehensive reference for the globally accepted standard sizes of O-rings used across various industries. Given the widespread use of O-rings in numerous applications and industrial equipment, the standardization of O-ring sizes is crucial. These charts serve as a valuable resource for defining industry-standard O-ring sizes.

In industrial applications, various O-ring size charts have been adopted as common standards in different countries.

There are several widely recognized O-ring size charts used in various countries and industries:

• AS568: This is a standard size chart used in the United States and is published by S.A.E. (Society of Automotive Engineers). It defines "Inch sizes" of O-rings.
•  BS 1806: This size chart adheres to the British Standard Institution and encompasses all imperial standard sizes. It includes sizes found in the AS568 metric size chart and additional sizes between AS568 metric sizes.
•  ISO 3601: This chart follows the specifications set by the International Organization for Standardization (ISO) and consists of Classes A & B type O-ring sizes.
•  BS 4518: Another standard size chart according to the British Standard Institution, providing O-ring sizes based on British Standard metric sizes commonly used in European industries.
•  SMS 1586: This size chart complies with Swedish Mechanical Standards and identifies O-rings by internal diameters and cross-sections.
•  DIN 3771: A standard size chart conforming to the German Standards Institute, where O-rings are identified by internal diameters and cross-sections.
•  NFT 47-501: This standard size chart is similar to ISO 3601-1 and represents the French Standard Institute.
•  JIS B 2401: This size chart adheres to the Japanese Industrial Standards and is commonly referred to as Japanese Metrics.
•  ISO 6149: O-rings falling under this standard size chart are designed for use in Metric Tube Fittings. It includes 13 different sizes and provides metric thread size information for each O-ring size.
•  Generic Metric O-ring Sizing Chart: This chart includes generalized or very common O-ring sizes that may or may not match any international standard sizes.

  These diverse size charts cater to the specific needs of various regions and industries, ensuring compatibility and standardization in O-ring applications.