AS568-376 O-Ring

Inside diameter 9.725″
Cross-section 0.210″
Outside diameter 10.145″
Metric (ID × CS) 247.01 × 5.33 mm

OD is derived: ID + 2 × CS = 9.725″ + 2 × 0.210″ = 10.145″.

Neighboring sizes (CS 0.210″ series)

Dash ID OD ID mm vs -376
-374 9.225″ 9.645″ 234.31 ID −0.500″
-375 9.475″ 9.895″ 240.66 ID −0.250″
-376 9.725″ 10.145″ 247.01
-377 9.975″ 10.395″ 253.36 ID +0.250″
-378 10.475″ 10.895″ 266.06 ID +0.750″
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.