AS568-223 O-Ring

Inside diameter 1.609″
Cross-section 0.139″
Outside diameter 1.887″
Metric (ID × CS) 40.87 × 3.53 mm

OD is derived: ID + 2 × CS = 1.609″ + 2 × 0.139″ = 1.887″.

Neighboring sizes (CS 0.139″ series)

Dash ID OD ID mm vs -223
-221 1.421″ 1.699″ 36.09 ID −0.188″
-222 1.484″ 1.762″ 37.69 ID −0.125″
-223 1.609″ 1.887″ 40.87
-224 1.734″ 2.012″ 44.04 ID +0.125″
-225 1.859″ 2.137″ 47.22 ID +0.250″
Data provenance. SAE AS568, Aerospace Size Standard for O-rings (SAE International). Nominal dimensions per AS568; size tolerances vary by dash number and are not yet cataloged. Groove/gland design depends on the application — consult a gland design reference. See all data sources.