AS568-366 O-Ring

Inside diameter 7.225″
Cross-section 0.210″
Outside diameter 7.645″
Metric (ID × CS) 183.51 × 5.33 mm

OD is derived: ID + 2 × CS = 7.225″ + 2 × 0.210″ = 7.645″.

Neighboring sizes (CS 0.210″ series)

Dash ID OD ID mm vs -366
-364 6.725″ 7.145″ 170.81 ID −0.500″
-365 6.975″ 7.395″ 177.16 ID −0.250″
-366 7.225″ 7.645″ 183.51
-367 7.475″ 7.895″ 189.86 ID +0.250″
-368 7.725″ 8.145″ 196.21 ID +0.500″

Same ID, other cross-sections

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.