AS568-273 O-Ring

Inside diameter 9.734″
Cross-section 0.139″
Outside diameter 10.012″
Metric (ID × CS) 247.24 × 3.53 mm

OD is derived: ID + 2 × CS = 9.734″ + 2 × 0.139″ = 10.012″.

Neighboring sizes (CS 0.139″ series)

Dash ID OD ID mm vs -273
-271 9.234″ 9.512″ 234.54 ID −0.500″
-272 9.484″ 9.762″ 240.89 ID −0.250″
-273 9.734″ 10.012″ 247.24
-274 9.984″ 10.262″ 253.59 ID +0.250″
-275 10.484″ 10.762″ 266.29 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.