AS568-264 O-Ring

Inside diameter 7.484″
Cross-section 0.139″
Outside diameter 7.762″
Metric (ID × CS) 190.09 × 3.53 mm

OD is derived: ID + 2 × CS = 7.484″ + 2 × 0.139″ = 7.762″.

Neighboring sizes (CS 0.139″ series)

Dash ID OD ID mm vs -264
-262 6.984″ 7.262″ 177.39 ID −0.500″
-263 7.234″ 7.512″ 183.74 ID −0.250″
-264 7.484″ 7.762″ 190.09
-265 7.734″ 8.012″ 196.44 ID +0.250″
-266 7.984″ 8.262″ 202.79 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.