AS568-265 O-Ring

Inside diameter 7.734″
Cross-section 0.139″
Outside diameter 8.012″
Metric (ID × CS) 196.44 × 3.53 mm

OD is derived: ID + 2 × CS = 7.734″ + 2 × 0.139″ = 8.012″.

Neighboring sizes (CS 0.139″ series)

Dash ID OD ID mm vs -265
-263 7.234″ 7.512″ 183.74 ID −0.500″
-264 7.484″ 7.762″ 190.09 ID −0.250″
-265 7.734″ 8.012″ 196.44
-266 7.984″ 8.262″ 202.79 ID +0.250″
-267 8.234″ 8.512″ 209.14 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.