O-rings - AS568 Sizes
AS568A Dash Number O-Ring Sizing
O-ring size is designated by a three digit dash number in the form -xxx. Two dimensions define the size of an O-ring: its inside diameter (ID), and its cross-sectional diameter (CS). Aerospace Standard AS568A , Aerospace Size Standard for O-rings, published by SAE, groups most standard sizes under one of five cross-sectional diameters (or series), as follows:
O-ring size is designated by a three digit dash number in the form -xxx. Two dimensions define the size of an O-ring: its inside diameter (ID), and its cross-sectional diameter (CS). Aerospace Standard AS568A , Aerospace Size Standard for O-rings, published by SAE, groups most standard sizes under one of five cross-sectional diameters (or series), as follows:
-000 Series O-rings 0.070" ±0.003"
- 1/16" CS
-100 Series O-rings 0.103" ±0.003" - 3/32" CS
-200 Series O-rings 0.139" ±0.004" - 1/8" CS
-300 Series O-rings 0.210" ±0.005" - 3/16" CS
-400 Series O-rings 0.275" ±0.006" - 1/4" CS
