AS568-210 O-Ring

Inside diameter 0.734″
Cross-section 0.139″
Outside diameter 1.012″
Metric (ID × CS) 18.64 × 3.53 mm

OD is derived: ID + 2 × CS = 0.734″ + 2 × 0.139″ = 1.012″.

Neighboring sizes (CS 0.139″ series)

Dash ID OD ID mm vs -210
-208 0.609″ 0.887″ 15.47 ID −0.125″
-209 0.671″ 0.949″ 17.04 ID −0.063″
-210 0.734″ 1.012″ 18.64
-211 0.796″ 1.074″ 20.22 ID +0.062″
-212 0.859″ 1.137″ 21.82 ID +0.125″
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.