AS568-272 O-Ring

Inside diameter 9.484″
Cross-section 0.139″
Outside diameter 9.762″
Metric (ID × CS) 240.89 × 3.53 mm

OD is derived: ID + 2 × CS = 9.484″ + 2 × 0.139″ = 9.762″.

Neighboring sizes (CS 0.139″ series)

Dash ID OD ID mm vs -272
-270 8.984″ 9.262″ 228.19 ID −0.500″
-271 9.234″ 9.512″ 234.54 ID −0.250″
-272 9.484″ 9.762″ 240.89
-273 9.734″ 10.012″ 247.24 ID +0.250″
-274 9.984″ 10.262″ 253.59 ID +0.500″
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.