AS568-368 O-Ring

Inside diameter 7.725″
Cross-section 0.210″
Outside diameter 8.145″
Metric (ID × CS) 196.21 × 5.33 mm

OD is derived: ID + 2 × CS = 7.725″ + 2 × 0.210″ = 8.145″.

Neighboring sizes (CS 0.210″ series)

Dash ID OD ID mm vs -368
-366 7.225″ 7.645″ 183.51 ID −0.500″
-367 7.475″ 7.895″ 189.86 ID −0.250″
-368 7.725″ 8.145″ 196.21
-369 7.975″ 8.395″ 202.56 ID +0.250″
-370 8.225″ 8.645″ 208.91 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.